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import { MatIconModule, MatIconRegistry } from '@angular/material';
import { DomSanitizer } from '@angular/platform-browser';
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<button mat-button>
<mat-icon>mic</mat-icon>
Start Recording
</button>
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npm install @fortawesome/fontawesome-svg-core
npm install @fortawesome/free-brands-svg-icons
npm install @fortawesome/free-regular-svg-icons
npm install @fortawesome/free-solid-svg-icons
npm install @fortawesome/angular-fontawesome