BP_Nouveau_Group_Invite_Query::get_inviter_ids( $user_id,  $group_id )

	public static function get_inviter_ids( $user_id = 0, $group_id = 0 ) {
		global $wpdb;

		if ( empty( $group_id ) || empty( $user_id ) ) {
			return array();
		}

		$bp = buddypress();

		return $wpdb->get_col( $wpdb->prepare( "SELECT inviter_id FROM {$bp->groups->table_name_members} WHERE user_id = %d AND group_id = %d", $user_id, $group_id ) );
	}