multi-check-option-2.ts

export abstract class MultiCheckOption {
  abstract value: any;
  public control = new FormControl(false);
  get valueChanges$(): Observable<boolean> {
    return this.control.valueChanges;
  }
}

@Component(...)
export class SimpleCheckOptionComponent extends MultiCheckOption {
  @Input() value: any;
  @Input() label: string;
}

@Component(...)
export class UserCheckOptionComponent extends MultiCheckOption {
  @Input() value: any;
}