public onCreate(savedInstanceState: android.os.Bundle): void {
    if (!this._callbacks) {
      setActivityCallbacks(this);
    }

    this._callbacks.onCreate(this, savedInstanceState, super.onCreate);
  }

 public onRequestPermissionsResult(requestCode: number, permissions: Array<string>, grantResults: Array<number>): void {
   this._callbacks.onRequestPermissionsResult(this, requestCode, permissions, grantResults, undefined);
 }

 public onActivityResult(requestCode: number, resultCode: number, data: android.content.Intent): void {
   this._callbacks.onActivityResult(this, requestCode, resultCode, data, super.onActivityResult);
 }

 public onBackPressed(): void {
   this._callbacks.onBackPressed(this, super.onBackPressed);
 }

 public onDestroy(): void {
   this._callbacks.onDestroy(this, super.onDestroy);
 }

 public onStop(): void {
   this._callbacks.onStop(this, super.onStop);
 }

 public onStart(): void {
   this._callbacks.onStart(this, super.onStart);
 }

 public onSaveInstanceState(outState: android.os.Bundle): void {
   this._callbacks.onSaveInstanceState(this, outState, super.onSaveInstanceState);
 }