单击mat切换按钮后如何停止mat-menu关闭？

<button mat-button [matMenuTriggerFor]="menu">切换按钮</button>
<mat-menu #menu="matMenu">
  <!-- mat-menu的内容 -->
</mat-menu>

import { Component, ViewChild } from '@angular/core';
import { MatMenuTrigger } from '@angular/material/menu';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent {
  @ViewChild(MatMenuTrigger) menuTrigger: MatMenuTrigger;

  stopMenuClose(event: MouseEvent): void {
    event.stopPropagation();
  }
}

<button mat-button [matMenuTriggerFor]="menu" (click)="stopMenuClose($event)">切换按钮</button>