public function variantName($format, $arg = null)
    {
        $args = func_get_args();
        array_shift($args);
        return $format . Convert::base64url_encode($args);
    }
public function variantName($format, $arg = null)
    {
        $args = func_get_args();
        array_shift($args);
        return $format . Convert::base64url_encode($args);
    }
public function variantName ( $ format , $ arg = null ) { $ args = func_get_args ( ) ; array_shift ( $ args ) ; return $ format . Convert :: base64url_encode ( $ args ) ; }
Name a variant based on a format with arbitrary parameters

@param string $format The format name.
@param mixed $arg,... Additional arguments
@return string
@throws InvalidArgumentException
Name a variant based on a format with arbitrary parameters