code: function ( type, text, numericalValue ) {
  		var content = THREE.LoaderSupport.Validator.isValid( text ) ? text: '';
  		var event = {
  			detail: {
  				type: type,
  				modelName: this.modelName,
  				instanceNo: this.instanceNo,
  				text: content,
  				numericalValue: numericalValue
  			}
  		};
  
  		if ( THREE.LoaderSupport.Validator.isValid( this.callbacks.onProgress ) ) this.callbacks.onProgress( event );
  
  		if ( this.logging.enabled && this.logging.debug ) console.debug( content );
  	}
docs: Announce feedback which is give to the registered callbacks.
  @private
  
  @param {string} type The type of event
  @param {string} text Textual description of the event
  @param {number} numericalValue Numerical value describing the progress