public function log($msg, array $data = [], $level = Logger::INFO): void
    {
        $this->mgr->log($msg, $data, $level);
    }
public function log($msg, array $data = [], $level = Logger::INFO): void
    {
        $this->mgr->log($msg, $data, $level);
    }
public function log ( $ msg , array $ data = [ ] , $ level = Logger :: INFO ) : void { $ this -> mgr -> log ( $ msg , $ data , $ level ) ; }
output log message
@see ServerInterface::log()
@param  string $msg
@param  array  $data
@param int     $level
output log message