public static function css(StreamInterface $input, StreamInterface $output)
    {
        $output->write((new CSSmin())->run((string) $input));

        return $output;
    }
public static function css(StreamInterface $input, StreamInterface $output)
    {
        $output->write((new CSSmin())->run((string) $input));

        return $output;
    }
public static function css ( StreamInterface $ input , StreamInterface $ output ) { $ output -> write ( ( new CSSmin ( ) ) -> run ( ( string ) $ input ) ) ; return $ output ; }
CSS minifier.

@param StreamInterface $input
@param StreamInterface $output

@return StreamInterface
CSS minifier .