addListener method
Implementation
MapsEventListener? addListener(String? eventName, Function? handler) =>
callMethod(this, 'addListener',
[eventName, handler == null ? null : allowInterop(handler)]);
MapsEventListener? addListener(String? eventName, Function? handler) =>
callMethod(this, 'addListener',
[eventName, handler == null ? null : allowInterop(handler)]);