bp_is_group_creator( BP_Groups_Group|null $group = null, int $user_id )

function bp_is_group_creator( $group = null, $user_id = 0 ) {
	global $groups_template;

	if ( empty( $group ) ) {
		$group =& $groups_template->group;
	}

	if ( empty( $user_id ) ) {
		$user_id = bp_loggedin_user_id();
	}

	return (bool) ( $group->creator_id == $user_id );
}