code: function _fnProcessingDisplay ( settings, show )
  	{
  		if ( settings.oFeatures.bProcessing ) {
  			$(settings.aanFeatures.r).css( 'visibility', show ? 'visible' : 'hidden' );
  		}
  	
  		_fnCallbackFire( settings, null, 'processing', [settings, show] );
  	}
docs: Display or hide the processing indicator
  @param {object} settings dataTables settings object
  @param {bool} show Show the processing indicator (true) or not (false)
  @memberof DataTable#oApi