how can i use the onWingSelected method

[dragosch]

<app-menu-container
  (onWingSelected)="onSelected($event)"
  [options]="options"
  [gutter]="gutter"
  [startAngles]="startAngles"
  [wings]="wings"></app-menu-container>

  onSelected(event) {
    console.log('onSelected: ', event);
  }