add _events getter

Author: targos

lib/events.js

@@ -377,6 +377,20 @@ EventEmitter.prototype.listeners = function listeners(type) {
   return ret;
 };
 
+Object.defineProperty(EventEmitter.prototype, '_events', {
+  get() {
+    const thisEvents = this[eventSymbol];
+    if (!thisEvents)
+      return;
+
+    const events = {};
+    for (let event of thisEvents.entries()) {
+      events[event[0]] = event[1];
+    }
+    return events;
+  }
+});
+
 EventEmitter.listenerCount = function(emitter, type) {
   var evlistener;
   var ret = 0;