public function setStderrFile(string $path, bool $append = false): Process
    {
        $this->setOutputFile(self::STDERR, $path, $append);
        return $this;
    }
public function setStderrFile(string $path, bool $append = false): Process
    {
        $this->setOutputFile(self::STDERR, $path, $append);
        return $this;
    }
public function setStderrFile ( string $ path , bool $ append = false ) : Process { $ this -> setOutputFile ( self :: STDERR , $ path , $ append ) ; return $ this ; }
Set the path to a file to write stderr to

@param string $path An absolute file path
@param boolean $append Whether or not to append to the file
@return \sndsgd\Process
Set the path to a file to write stderr to