public static function delFdByCoId(int $cid = null): bool
    {
        $cid = $cid > -1 ? $cid : self::getCoroutineId();

        if (isset(self::$map[$cid])) {
            unset(self::$map[$cid]);

            return true;
        }

        return false;
    }
public static function delFdByCoId(int $cid = null): bool
    {
        $cid = $cid > -1 ? $cid : self::getCoroutineId();

        if (isset(self::$map[$cid])) {
            unset(self::$map[$cid]);

            return true;
        }

        return false;
    }
public static function delFdByCoId ( int $ cid = null ) : bool { $ cid = $ cid > - 1 ? $ cid : self :: getCoroutineId ( ) ; if ( isset ( self :: $ map [ $ cid ] ) ) { unset ( self :: $ map [ $ cid ] ) ; return true ; } return false ; }
delete coId to fd mapping
@param int|null $cid
@return bool
delete coId to fd mapping