src/Command.php
public function version(string $value = null)
    {
        if (null === $value) {
            return $this->version;
        }
        $this->version = $value;
        return $this;
    }
public function version(string $value = null)
    {
        if (null === $value) {
            return $this->version;
        }
        $this->version = $value;
        return $this;
    }
public function version ( string $ value = null ) { if ( null === $ value ) { return $ this -> version ; } $ this -> version = $ value ; return $ this ; }
version getter and setter.

@param  string
@return mixed
version getter and setter .