dev@505: <button mat-icon-button (click)="emitToggleRecording()">
dev@505:   <mat-icon>
dev@236:     <ng-template [ngIf]="recordingStatus == 'enabled'">mic_none</ng-template>
dev@236:     <ng-template [ngIf]="recordingStatus == 'disabled'">mic_off</ng-template>
dev@236:     <ng-template [ngIf]="recordingStatus == 'recording'">mic_on</ng-template>
dev@505:   </mat-icon>
dev@133: </button>
dev@133: