1  export class Event {
 2    private _didStopImmediatePropagation = false
 3  
 4    didStopImmediatePropagation(): boolean {
 5      return this._didStopImmediatePropagation
 6    }
 7  
 8    stopImmediatePropagation(): void {
 9      this._didStopImmediatePropagation = true
10    }
11  }