可以订阅Angular组件中的局部变量吗？

import { BehaviorSubject } from 'rxjs';

@Component({
  selector: 'app-example',
  template: `
    <button (click)="updateValue()">Update Value</button>
  `
})
export class ExampleComponent {
  private localVariable = new BehaviorSubject<string>('Initial Value');
  
  updateValue() {
    // 更新局部变量的值
    this.localVariable.next('New Value');
  }
}

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

@Component({
  selector: 'app-subscriber',
  template: `
    <p>{{ value }}</p>
  `
})
export class SubscriberComponent implements OnInit {
  value: string;

  constructor(private exampleComponent: ExampleComponent) { }

  ngOnInit() {
    // 订阅局部变量的变化
    this.exampleComponent.localVariable.subscribe(newValue => {
      this.value = newValue;
    });
  }
}