Fix last type error by patching fetch type

Author: zephraph

codemods/safe-fetch.api.js

@@ -0,0 +1,33 @@
+/**
+ * This codemod patches the open-api's generated `runtime.ts` file
+ * to ensure the member property `get fetchApi` returns a valid fetch
+ * function.
+ *
+ * @param {import('jscodeshift').FileInfo} file
+ * @param {import('jscodeshift').API} api
+ */
+export default function transformer(file, api) {
+  const j = api.jscodeshift
+
+  if (!file.path.endsWith('runtime.ts')) return
+
+  const source = j(file.source)
+  let returnStatement
+
+  return source
+    .find(j.ClassMethod, { key: { name: 'fetchApi' } })
+    .find(j.ReturnStatement)
+    .forEach((r) => {
+      returnStatement = r
+    })
+    .replaceWith(
+      j.returnStatement(
+        j.logicalExpression(
+          '||',
+          returnStatement.value.argument,
+          j.identifier('fetch')
+        )
+      )
+    )
+    .toSource()
+}