<div class="stackablepanel">
  <div class="title" (click)="toggle.emit()">
  </div>
  <div style="text-align: center; font-size: 12px;cursor: pointer " (click)="toggle.emit()">{{title}} </div>
  <div class="body" [ngStyle]="{'display': open ? '': 'none'}">
    <ng-content></ng-content>
  </div>
  <div>
