Source Reference:

• Component: BuddyPress:: bp-activity

  File: /bp-activity/bp-activity-functions.php :: Trac Source Line: 173

  	if ( 'string' == $format ) {
  		$return = apply_filters( $filter, '<a href="' . $at_mention_link . '" title="' . $at_mention_title . '">' . $text . '</a>', $at_mention_link, (int)$total_items, $activity_id, $poster_user_id );
  	} else {
  		$return = apply_filters( $filter, array(
  			'text' => $text,
  			'link' => $at_mention_link
  		), $at_mention_link, (int)$total_items, $activity_id, $poster_user_id );
  	}
  
  	do_action( 'activity_format_notifications', $action, $item_id, $secondary_item_id, $total_items );
  
  	return $return;
  }
  
  /** Actions ******************************************************************/
  
  /**
   * Sets the current action for a given activity stream location
   *
   * @since 1.1.0