如何检查组件是否已存在于viewContainerRef Angular中

import { Component, ComponentFactoryResolver, ViewContainerRef } from '@angular/core';

@Component({
  selector: 'app-dynamic-component',
  template: `
    <ng-template #container></ng-template>
    <button (click)="checkComponent()">Check Component</button>
  `
})
export class DynamicComponent {
  @ViewChild('container', { read: ViewContainerRef }) container: ViewContainerRef;

  constructor(private componentFactoryResolver: ComponentFactoryResolver) {}

  checkComponent() {
    const componentIndex = this.container.indexOf(ComponentToCheck);
    if (componentIndex !== -1) {
      console.log('Component exists in viewContainerRef');
    } else {
      console.log('Component does not exist in viewContainerRef');
    }
  }
}

@Component({
  selector: 'app-component-to-check',
  template: 'Component to check'
})
export class ComponentToCheck {}