bp_get_group_type_directory_permalink( string $group_type = '' )

	function bp_get_group_type_directory_permalink( $group_type = '' ) {

		if ( $group_type ) {
			$_group_type = $group_type;
		} else {
			// Fall back on the current group type.
			$_group_type = bp_get_current_group_directory_type();
		}

		$type = bp_groups_get_group_type_object( $_group_type );

		// Bail when profile type is not found or has no directory.
		if ( ! $type || ! $type->has_directory ) {
			return '';
		}

		/**
		 * Filters the group type directory permalink.
		 *
		 * @since BuddyPress 2.7.0
		 *
		 * @param string $value       Group type directory permalink.
		 * @param object $type        Group type object.
		 * @param string $member_type Group type name, as passed to the function.
		 */
		return apply_filters( 'bp_get_group_type_directory_permalink', trailingslashit( bp_get_groups_directory_permalink() . bp_get_groups_group_type_base() . '/' . $type->directory_slug ), $type, $group_type );
	}