diff --git a/Firestore/Example/SwiftBuildTest/main.swift b/Firestore/Example/SwiftBuildTest/main.swift
index 06d9479f44a..d53b3c63a34 100644
--- a/Firestore/Example/SwiftBuildTest/main.swift
+++ b/Firestore/Example/SwiftBuildTest/main.swift
@@ -219,11 +219,11 @@ func readDocument(at docRef: DocumentReference) {
 }
 
 func readDocumentWithOptions(at docRef: DocumentReference) {
-  docRef.getDocument(source: Source.default) { document, error in
+  docRef.getDocument(source: FirestoreSource.default) { document, error in
   }
   docRef.getDocument(source: .server) { document, error in
   }
-  docRef.getDocument(source: Source.cache) { document, error in
+  docRef.getDocument(source: FirestoreSource.cache) { document, error in
   }
 }
 
@@ -238,11 +238,11 @@ func readDocuments(matching query: Query) {
 }
 
 func readDocumentsWithOptions(matching query: Query) {
-  query.getDocuments(source: Source.default) { querySnapshot, error in
+  query.getDocuments(source: FirestoreSource.default) { querySnapshot, error in
   }
   query.getDocuments(source: .server) { querySnapshot, error in
   }
-  query.getDocuments(source: Source.cache) { querySnapshot, error in
+  query.getDocuments(source: FirestoreSource.cache) { querySnapshot, error in
   }
 }
 
diff --git a/Firestore/Example/Tests/Integration/API/FIRSourceTests.mm b/Firestore/Example/Tests/Integration/API/FIRSourceTests.mm
index f3649c9371b..0f844c6dd14 100644
--- a/Firestore/Example/Tests/Integration/API/FIRSourceTests.mm
+++ b/Firestore/Example/Tests/Integration/API/FIRSourceTests.mm
@@ -22,10 +22,10 @@
 #import "Firestore/Source/API/FIRFirestore+Internal.h"
 #import "Firestore/Source/Core/FSTFirestoreClient.h"
 
-@interface FIRGetSourceTests : FSTIntegrationTestCase
+@interface FIRFirestoreSourceTests : FSTIntegrationTestCase
 @end
 
-@implementation FIRGetSourceTests
+@implementation FIRFirestoreSourceTests
 
 - (void)testGetDocumentWhileOnlineWithDefaultSource {
   FIRDocumentReference *doc = [self documentRef];
@@ -144,7 +144,7 @@ - (void)testGetDocumentWhileOnlineCacheOnly {
 
   // get doc and ensure that it exists, *is* from the cache, and matches
   // the initialData.
-  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRGetSourceCache];
+  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.exists);
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertFalse(result.metadata.hasPendingWrites);
@@ -164,7 +164,7 @@ - (void)testGetCollectionWhileOnlineCacheOnly {
 
   // get docs and ensure they *are* from the cache, and matches the
   // initialDocs.
-  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRGetSourceCache];
+  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertFalse(result.metadata.hasPendingWrites);
   XCTAssertEqualObjects(FIRQuerySnapshotGetData(result), (@[
@@ -200,7 +200,7 @@ - (void)testGetDocumentWhileOfflineCacheOnly {
 
   // get doc and ensure it exists, *is* from the cache, and matches the
   // newData.
-  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRGetSourceCache];
+  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.exists);
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertTrue(result.metadata.hasPendingWrites);
@@ -230,7 +230,7 @@ - (void)testGetCollectionWhileOfflineCacheOnly {
 
   // get docs and ensure they *are* from the cache, and matches the updated
   // data.
-  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRGetSourceCache];
+  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertTrue(result.metadata.hasPendingWrites);
   XCTAssertEqualObjects(FIRQuerySnapshotGetData(result), (@[
@@ -255,7 +255,7 @@ - (void)testGetDocumentWhileOnlineServerOnly {
 
   // get doc and ensure that it exists, is *not* from the cache, and matches
   // the initialData.
-  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRGetSourceServer];
+  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRFirestoreSourceServer];
   XCTAssertTrue(result.exists);
   XCTAssertFalse(result.metadata.fromCache);
   XCTAssertFalse(result.metadata.hasPendingWrites);
@@ -275,7 +275,7 @@ - (void)testGetCollectionWhileOnlineServerOnly {
 
   // get docs and ensure they are *not* from the cache, and matches the
   // initialData.
-  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRGetSourceServer];
+  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRFirestoreSourceServer];
   XCTAssertFalse(result.metadata.fromCache);
   XCTAssertFalse(result.metadata.hasPendingWrites);
   XCTAssertEqualObjects(FIRQuerySnapshotGetData(result), (@[
@@ -302,7 +302,7 @@ - (void)testGetDocumentWhileOfflineServerOnly {
 
   // attempt to get doc and ensure it cannot be retreived
   XCTestExpectation *failedGetDocCompletion = [self expectationWithDescription:@"failedGetDoc"];
-  [doc getDocumentWithSource:FIRGetSourceServer
+  [doc getDocumentWithSource:FIRFirestoreSourceServer
                   completion:^(FIRDocumentSnapshot *snapshot, NSError *error) {
                     XCTAssertNotNil(error);
                     XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -328,7 +328,7 @@ - (void)testGetCollectionWhileOfflineServerOnly {
 
   // attempt to get docs and ensure they cannot be retreived
   XCTestExpectation *failedGetDocsCompletion = [self expectationWithDescription:@"failedGetDocs"];
-  [col getDocumentsWithSource:FIRGetSourceServer
+  [col getDocumentsWithSource:FIRFirestoreSourceServer
                    completion:^(FIRQuerySnapshot *snapshot, NSError *error) {
                      XCTAssertNotNil(error);
                      XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -367,14 +367,14 @@ - (void)testGetDocumentWhileOfflineWithDifferentSource {
 
   // get doc (from cache) and ensure it exists, *is* from the cache, and
   // matches the newData.
-  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRGetSourceCache];
+  FIRDocumentSnapshot *result = [self readDocumentForRef:doc source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.exists);
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertTrue(result.metadata.hasPendingWrites);
   XCTAssertEqualObjects(result.data, newData);
 
   // attempt to get doc (with default get source)
-  result = [self readDocumentForRef:doc source:FIRGetSourceDefault];
+  result = [self readDocumentForRef:doc source:FIRFirestoreSourceDefault];
   XCTAssertTrue(result.exists);
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertTrue(result.metadata.hasPendingWrites);
@@ -382,7 +382,7 @@ - (void)testGetDocumentWhileOfflineWithDifferentSource {
 
   // attempt to get doc (from the server) and ensure it cannot be retreived
   XCTestExpectation *failedGetDocCompletion = [self expectationWithDescription:@"failedGetDoc"];
-  [doc getDocumentWithSource:FIRGetSourceServer
+  [doc getDocumentWithSource:FIRFirestoreSourceServer
                   completion:^(FIRDocumentSnapshot *snapshot, NSError *error) {
                     XCTAssertNotNil(error);
                     XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -424,7 +424,7 @@ - (void)testGetCollectionWhileOfflineWithDifferentSource {
 
   // get docs (from cache) and ensure they *are* from the cache, and
   // matches the updated data.
-  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRGetSourceCache];
+  FIRQuerySnapshot *result = [self readDocumentSetForRef:col source:FIRFirestoreSourceCache];
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertTrue(result.metadata.hasPendingWrites);
   XCTAssertEqualObjects(FIRQuerySnapshotGetData(result), (@[
@@ -440,7 +440,7 @@ - (void)testGetCollectionWhileOfflineWithDifferentSource {
       ]));
 
   // attempt to get docs (with default get source)
-  result = [self readDocumentSetForRef:col source:FIRGetSourceDefault];
+  result = [self readDocumentSetForRef:col source:FIRFirestoreSourceDefault];
   XCTAssertTrue(result.metadata.fromCache);
   XCTAssertEqualObjects(FIRQuerySnapshotGetData(result), (@[
                           @{@"key1" : @"value1"}, @{@"key2" : @"value2", @"key2b" : @"value2b"},
@@ -456,7 +456,7 @@ - (void)testGetCollectionWhileOfflineWithDifferentSource {
 
   // attempt to get docs (from the server) and ensure they cannot be retreived
   XCTestExpectation *failedGetDocsCompletion = [self expectationWithDescription:@"failedGetDocs"];
-  [col getDocumentsWithSource:FIRGetSourceServer
+  [col getDocumentsWithSource:FIRFirestoreSourceServer
                    completion:^(FIRQuerySnapshot *snapshot, NSError *error) {
                      XCTAssertNotNil(error);
                      XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -529,7 +529,7 @@ - (void)testGetNonExistingDocWhileOnlineCacheOnly {
   // certain documents *don't* exist.
   XCTestExpectation *getNonExistingDocCompletion =
       [self expectationWithDescription:@"getNonExistingDoc"];
-  [doc getDocumentWithSource:FIRGetSourceCache
+  [doc getDocumentWithSource:FIRFirestoreSourceCache
                   completion:^(FIRDocumentSnapshot *snapshot, NSError *error) {
                     XCTAssertNotNil(error);
                     XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -543,7 +543,7 @@ - (void)testGetNonExistingCollectionWhileOnlineCacheOnly {
   FIRCollectionReference *col = [self collectionRef];
 
   // get collection and ensure it's empty and that it *is* from the cache.
-  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRGetSourceCache];
+  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRFirestoreSourceCache];
   XCTAssertEqual(snapshot.count, 0);
   XCTAssertEqual(snapshot.documentChanges.count, 0);
   XCTAssertTrue(snapshot.metadata.fromCache);
@@ -561,7 +561,7 @@ - (void)testGetNonExistingDocWhileOfflineCacheOnly {
   // certain documents *don't* exist.
   XCTestExpectation *getNonExistingDocCompletion =
       [self expectationWithDescription:@"getNonExistingDoc"];
-  [doc getDocumentWithSource:FIRGetSourceCache
+  [doc getDocumentWithSource:FIRFirestoreSourceCache
                   completion:^(FIRDocumentSnapshot *snapshot, NSError *error) {
                     XCTAssertNotNil(error);
                     XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -578,7 +578,7 @@ - (void)testGetNonExistingCollectionWhileOfflineCacheOnly {
   [self disableNetwork];
 
   // get collection and ensure it's empty and that it *is* from the cache.
-  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRGetSourceCache];
+  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRFirestoreSourceCache];
   XCTAssertEqual(snapshot.count, 0);
   XCTAssertEqual(snapshot.documentChanges.count, 0);
   XCTAssertTrue(snapshot.metadata.fromCache);
@@ -589,7 +589,7 @@ - (void)testGetNonExistingDocWhileOnlineServerOnly {
   FIRDocumentReference *doc = [self documentRef];
 
   // get doc and ensure that it does not exist and is *not* from the cache.
-  FIRDocumentSnapshot *snapshot = [self readDocumentForRef:doc source:FIRGetSourceServer];
+  FIRDocumentSnapshot *snapshot = [self readDocumentForRef:doc source:FIRFirestoreSourceServer];
   XCTAssertFalse(snapshot.exists);
   XCTAssertFalse(snapshot.metadata.fromCache);
   XCTAssertFalse(snapshot.metadata.hasPendingWrites);
@@ -599,7 +599,7 @@ - (void)testGetNonExistingCollectionWhileOnlineServerOnly {
   FIRCollectionReference *col = [self collectionRef];
 
   // get collection and ensure that it's empty and that it's *not* from the cache.
-  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRGetSourceServer];
+  FIRQuerySnapshot *snapshot = [self readDocumentSetForRef:col source:FIRFirestoreSourceServer];
   XCTAssertEqual(snapshot.count, 0);
   XCTAssertEqual(snapshot.documentChanges.count, 0);
   XCTAssertFalse(snapshot.metadata.fromCache);
@@ -617,7 +617,7 @@ - (void)testGetNonExistingDocWhileOfflineServerOnly {
   // certain documents *don't* exist.
   XCTestExpectation *getNonExistingDocCompletion =
       [self expectationWithDescription:@"getNonExistingDoc"];
-  [doc getDocumentWithSource:FIRGetSourceServer
+  [doc getDocumentWithSource:FIRFirestoreSourceServer
                   completion:^(FIRDocumentSnapshot *snapshot, NSError *error) {
                     XCTAssertNotNil(error);
                     XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
@@ -635,7 +635,7 @@ - (void)testGetNonExistingCollectionWhileOfflineServerOnly {
 
   // attempt to get collection and ensure that it cannot be retreived
   XCTestExpectation *failedGetDocsCompletion = [self expectationWithDescription:@"failedGetDocs"];
-  [col getDocumentsWithSource:FIRGetSourceServer
+  [col getDocumentsWithSource:FIRFirestoreSourceServer
                    completion:^(FIRQuerySnapshot *snapshot, NSError *error) {
                      XCTAssertNotNil(error);
                      XCTAssertEqualObjects(error.domain, FIRFirestoreErrorDomain);
diff --git a/Firestore/Example/Tests/Util/FSTIntegrationTestCase.h b/Firestore/Example/Tests/Util/FSTIntegrationTestCase.h
index ddff759c38b..ed51b169599 100644
--- a/Firestore/Example/Tests/Util/FSTIntegrationTestCase.h
+++ b/Firestore/Example/Tests/Util/FSTIntegrationTestCase.h
@@ -20,7 +20,7 @@
 #import "Firestore/Example/Tests/Util/XCTestCase+Await.h"
 #import "Firestore/Source/Core/FSTTypes.h"
 
-#import "FIRGetSource.h"
+#import "FIRFirestoreSource.h"
 
 @class FIRCollectionReference;
 @class FIRDocumentSnapshot;
@@ -73,11 +73,12 @@ extern "C" {
 
 - (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref;
 
-- (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref source:(FIRGetSource)source;
+- (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref
+                                     source:(FIRFirestoreSource)source;
 
 - (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query;
 
-- (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query source:(FIRGetSource)source;
+- (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query source:(FIRFirestoreSource)source;
 
 - (FIRDocumentSnapshot *)readSnapshotForRef:(FIRDocumentReference *)query
                               requireOnline:(BOOL)online;
diff --git a/Firestore/Example/Tests/Util/FSTIntegrationTestCase.mm b/Firestore/Example/Tests/Util/FSTIntegrationTestCase.mm
index 333b4bc6129..598fe49c39e 100644
--- a/Firestore/Example/Tests/Util/FSTIntegrationTestCase.mm
+++ b/Firestore/Example/Tests/Util/FSTIntegrationTestCase.mm
@@ -210,11 +210,11 @@ - (void)readerAndWriterOnDocumentRef:(void (^)(NSString *path,
 }
 
 - (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref {
-  return [self readDocumentForRef:ref source:FIRGetSourceDefault];
+  return [self readDocumentForRef:ref source:FIRFirestoreSourceDefault];
 }
 
 - (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref
-                                     source:(FIRGetSource)source {
+                                     source:(FIRFirestoreSource)source {
   __block FIRDocumentSnapshot *result;
 
   XCTestExpectation *expectation = [self expectationWithDescription:@"getData"];
@@ -230,10 +230,10 @@ - (FIRDocumentSnapshot *)readDocumentForRef:(FIRDocumentReference *)ref
 }
 
 - (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query {
-  return [self readDocumentSetForRef:query source:FIRGetSourceDefault];
+  return [self readDocumentSetForRef:query source:FIRFirestoreSourceDefault];
 }
 
-- (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query source:(FIRGetSource)source {
+- (FIRQuerySnapshot *)readDocumentSetForRef:(FIRQuery *)query source:(FIRFirestoreSource)source {
   __block FIRQuerySnapshot *result;
 
   XCTestExpectation *expectation = [self expectationWithDescription:@"getData"];
diff --git a/Firestore/Source/API/FIRDocumentReference.mm b/Firestore/Source/API/FIRDocumentReference.mm
index 90109c46c3b..4fcb27c59fa 100644
--- a/Firestore/Source/API/FIRDocumentReference.mm
+++ b/Firestore/Source/API/FIRDocumentReference.mm
@@ -19,7 +19,7 @@
 #import <GRPCClient/GRPCCall.h>
 
 #import "FIRFirestoreErrors.h"
-#import "FIRGetSource.h"
+#import "FIRFirestoreSource.h"
 #import "FIRSnapshotMetadata.h"
 #import "Firestore/Source/API/FIRCollectionReference+Internal.h"
 #import "Firestore/Source/API/FIRDocumentReference+Internal.h"
@@ -207,13 +207,13 @@ - (void)deleteDocumentWithCompletion:(nullable void (^)(NSError *_Nullable error
 
 - (void)getDocumentWithCompletion:(void (^)(FIRDocumentSnapshot *_Nullable document,
                                             NSError *_Nullable error))completion {
-  return [self getDocumentWithSource:FIRGetSourceDefault completion:completion];
+  return [self getDocumentWithSource:FIRFirestoreSourceDefault completion:completion];
 }
 
-- (void)getDocumentWithSource:(FIRGetSource)source
+- (void)getDocumentWithSource:(FIRFirestoreSource)source
                    completion:(void (^)(FIRDocumentSnapshot *_Nullable document,
                                         NSError *_Nullable error))completion {
-  if (source == FIRGetSourceCache) {
+  if (source == FIRFirestoreSourceCache) {
     [self.firestore.client getDocumentFromLocalCache:self completion:completion];
     return;
   }
@@ -252,16 +252,18 @@ - (void)getDocumentWithSource:(FIRGetSource)source
                                    NSLocalizedDescriptionKey :
                                        @"Failed to get document because the client is offline.",
                                  }]);
-    } else if (snapshot.exists && snapshot.metadata.fromCache && source == FIRGetSourceServer) {
-      completion(nil, [NSError errorWithDomain:FIRFirestoreErrorDomain
-                                          code:FIRFirestoreErrorCodeUnavailable
-                                      userInfo:@{
-                                        NSLocalizedDescriptionKey :
-                                            @"Failed to get document from server. (However, this "
-                                            @"document does exist in the local cache. Run again "
-                                            @"without setting source to FIRGetSourceServer to "
-                                            @"retrieve the cached document.)"
-                                      }]);
+    } else if (snapshot.exists && snapshot.metadata.fromCache &&
+               source == FIRFirestoreSourceServer) {
+      completion(nil,
+                 [NSError errorWithDomain:FIRFirestoreErrorDomain
+                                     code:FIRFirestoreErrorCodeUnavailable
+                                 userInfo:@{
+                                   NSLocalizedDescriptionKey :
+                                       @"Failed to get document from server. (However, this "
+                                       @"document does exist in the local cache. Run again "
+                                       @"without setting source to FIRFirestoreSourceServer to "
+                                       @"retrieve the cached document.)"
+                                 }]);
     } else {
       completion(snapshot, nil);
     }
diff --git a/Firestore/Source/API/FIRQuery.mm b/Firestore/Source/API/FIRQuery.mm
index af2df4cb4e1..313be214461 100644
--- a/Firestore/Source/API/FIRQuery.mm
+++ b/Firestore/Source/API/FIRQuery.mm
@@ -18,7 +18,7 @@
 
 #import "FIRDocumentReference.h"
 #import "FIRFirestoreErrors.h"
-#import "FIRGetSource.h"
+#import "FIRFirestoreSource.h"
 #import "Firestore/Source/API/FIRDocumentReference+Internal.h"
 #import "Firestore/Source/API/FIRDocumentSnapshot+Internal.h"
 #import "Firestore/Source/API/FIRFieldPath+Internal.h"
@@ -131,13 +131,13 @@ - (NSUInteger)hash {
 
 - (void)getDocumentsWithCompletion:(void (^)(FIRQuerySnapshot *_Nullable snapshot,
                                              NSError *_Nullable error))completion {
-  [self getDocumentsWithSource:FIRGetSourceDefault completion:completion];
+  [self getDocumentsWithSource:FIRFirestoreSourceDefault completion:completion];
 }
 
-- (void)getDocumentsWithSource:(FIRGetSource)source
+- (void)getDocumentsWithSource:(FIRFirestoreSource)source
                     completion:(void (^)(FIRQuerySnapshot *_Nullable snapshot,
                                          NSError *_Nullable error))completion {
-  if (source == FIRGetSourceCache) {
+  if (source == FIRFirestoreSourceCache) {
     [self.firestore.client getDocumentsFromLocalCache:self completion:completion];
     return;
   }
@@ -160,16 +160,17 @@ - (void)getDocumentsWithSource:(FIRGetSource)source
     dispatch_semaphore_wait(registered, DISPATCH_TIME_FOREVER);
     [listenerRegistration remove];
 
-    if (snapshot.metadata.fromCache && source == FIRGetSourceServer) {
-      completion(nil, [NSError errorWithDomain:FIRFirestoreErrorDomain
-                                          code:FIRFirestoreErrorCodeUnavailable
-                                      userInfo:@{
-                                        NSLocalizedDescriptionKey :
-                                            @"Failed to get documents from server. (However, these "
-                                            @"documents may exist in the local cache. Run again "
-                                            @"without setting source to FIRGetSourceServer to "
-                                            @"retrieve the cached documents.)"
-                                      }]);
+    if (snapshot.metadata.fromCache && source == FIRFirestoreSourceServer) {
+      completion(nil,
+                 [NSError errorWithDomain:FIRFirestoreErrorDomain
+                                     code:FIRFirestoreErrorCodeUnavailable
+                                 userInfo:@{
+                                   NSLocalizedDescriptionKey :
+                                       @"Failed to get documents from server. (However, these "
+                                       @"documents may exist in the local cache. Run again "
+                                       @"without setting source to FIRFirestoreSourceServer to "
+                                       @"retrieve the cached documents.)"
+                                 }]);
     } else {
       completion(snapshot, nil);
     }
diff --git a/Firestore/Source/Core/FSTFirestoreClient.mm b/Firestore/Source/Core/FSTFirestoreClient.mm
index 2c7c85f42a3..97968553960 100644
--- a/Firestore/Source/Core/FSTFirestoreClient.mm
+++ b/Firestore/Source/Core/FSTFirestoreClient.mm
@@ -291,15 +291,16 @@ - (void)getDocumentFromLocalCache:(FIRDocumentReference *)doc
                                                   fromCache:YES],
                  nil);
     } else {
-      completion(nil, [NSError errorWithDomain:FIRFirestoreErrorDomain
-                                          code:FIRFirestoreErrorCodeUnavailable
-                                      userInfo:@{
-                                        NSLocalizedDescriptionKey :
-                                            @"Failed to get document from cache. (However, this "
-                                            @"document may exist on the server. Run again without "
-                                            @"setting source to FIRGetSourceCache to attempt to "
-                                            @"retrieve the document from the server.)",
-                                      }]);
+      completion(nil,
+                 [NSError errorWithDomain:FIRFirestoreErrorDomain
+                                     code:FIRFirestoreErrorCodeUnavailable
+                                 userInfo:@{
+                                   NSLocalizedDescriptionKey :
+                                       @"Failed to get document from cache. (However, this "
+                                       @"document may exist on the server. Run again without "
+                                       @"setting source to FIRFirestoreSourceCache to attempt to "
+                                       @"retrieve the document from the server.)",
+                                 }]);
     }
   }];
 }
diff --git a/Firestore/Source/Public/FIRDocumentReference.h b/Firestore/Source/Public/FIRDocumentReference.h
index 39d95b1ffe3..5b10e3f90c5 100644
--- a/Firestore/Source/Public/FIRDocumentReference.h
+++ b/Firestore/Source/Public/FIRDocumentReference.h
@@ -16,7 +16,7 @@
 
 #import <Foundation/Foundation.h>
 
-#import "FIRGetSource.h"
+#import "FIRFirestoreSource.h"
 #import "FIRListenerRegistration.h"
 
 @class FIRFirestore;
@@ -210,7 +210,7 @@ NS_SWIFT_NAME(DocumentReference)
  * @param completion a block to execute once the document has been successfully read.
  */
 // clang-format off
-- (void)getDocumentWithSource:(FIRGetSource)source completion:(FIRDocumentSnapshotBlock)completion
+- (void)getDocumentWithSource:(FIRFirestoreSource)source completion:(FIRDocumentSnapshotBlock)completion
     NS_SWIFT_NAME(getDocument(source:completion:));
 // clang-format on
 
diff --git a/Firestore/Source/Public/FIRGetSource.h b/Firestore/Source/Public/FIRFirestoreSource.h
similarity index 92%
rename from Firestore/Source/Public/FIRGetSource.h
rename to Firestore/Source/Public/FIRFirestoreSource.h
index 0ecc6c1f0d0..c1337475ffa 100644
--- a/Firestore/Source/Public/FIRGetSource.h
+++ b/Firestore/Source/Public/FIRFirestoreSource.h
@@ -41,8 +41,8 @@
  * `QuerySnapshot.getDocuments()` will return an empty `QuerySnapshot` with no
  * documents.
  */
-typedef NS_ENUM(NSUInteger, FIRGetSource) {
-  FIRGetSourceDefault,
-  FIRGetSourceServer,
-  FIRGetSourceCache
-} NS_SWIFT_NAME(Source);
+typedef NS_ENUM(NSUInteger, FIRFirestoreSource) {
+  FIRFirestoreSourceDefault,
+  FIRFirestoreSourceServer,
+  FIRFirestoreSourceCache
+} NS_SWIFT_NAME(FirestoreSource);
diff --git a/Firestore/Source/Public/FIRQuery.h b/Firestore/Source/Public/FIRQuery.h
index b852fffd0f3..52255998b70 100644
--- a/Firestore/Source/Public/FIRQuery.h
+++ b/Firestore/Source/Public/FIRQuery.h
@@ -16,7 +16,7 @@
 
 #import <Foundation/Foundation.h>
 
-#import "FIRGetSource.h"
+#import "FIRFirestoreSource.h"
 #import "FIRListenerRegistration.h"
 
 @class FIRFieldPath;
@@ -106,7 +106,7 @@ NS_SWIFT_NAME(Query)
  *     documentSet will be `nil` only if error is `non-nil`.
  */
 // clang-format off
-- (void)getDocumentsWithSource:(FIRGetSource)source completion:(FIRQuerySnapshotBlock)completion
+- (void)getDocumentsWithSource:(FIRFirestoreSource)source completion:(FIRQuerySnapshotBlock)completion
     NS_SWIFT_NAME(getDocuments(source:completion:));
 // clang-format on