text: /** Base class for all overlay settings objects */
  export class OverlaySettings {
      constructor(overlaySettingsType) {
          /** type of the overlay settings object */
          this.overlaySettingsType = overlaySettingsType;
          /** whether front camera should be used instead of the default camera */
          this.useFrontCamera = false;
          /** whether beep sound will be played on successful scan */
          this.enableBeep = false;
      }      
  }