Add missing method declaration (#1308)

* Add missing method declaration

* Add eventsoff to the wrapper

v2/internal/frontend/runtime/wrapper/events.js

@@ -34,6 +34,16 @@ export function EventsOn(eventName, callback) {
 	OnMultiple(eventName, callback, -1);
 }
 
+/**
+ * Unregisters the listener for the given event name
+ *
+ * @export
+ * @param {string} eventName
+ */
+export function EventsOff(eventName) {
+    return window.runtime.EventsOff(eventName);
+}
+
 /**
  * Registers an event listener that will be invoked once then destroyed
  *

v2/internal/frontend/runtime/wrapper/runtime.d.ts

@@ -17,6 +17,8 @@ export interface runtime {
 
     EventsOnce(eventName: string, callback: (data?: any) => void): void;
 
+    EventsOff(eventName: string): void;
+
     LogTrace(message: string): void;
 
     LogDebug(message: string): void;