bp_get_activity_comment_name()

	function bp_get_activity_comment_name() {
		global $activities_template;

		if ( isset( $activities_template->activity->current_comment->user_fullname ) ) {

			$name = apply_filters( 'bp_acomment_name', $activities_template->activity->current_comment->user_fullname, $activities_template->activity->current_comment );  // Backward compatibility.
		} else {
			$name = $activities_template->activity->current_comment->display_name;
		}

		/**
		 * Filters the name of the author for the activity comment.
		 *
		 * @since BuddyPress 1.5.0
		 *
		 * @param string $name Name to be displayed with the activity comment.
		 */
		return apply_filters( 'bp_activity_comment_name', $name );
	}