Automattic / jetpack

		if ( ! $css )

			return '';

		if ( $preprocessor ) {

			/** This filter is documented in modules/custom-css/custom-css.php */

			$preprocessors = apply_filters( 'jetpack_custom_css_preprocessors', array() );

			if ( isset( $preprocessors[$preprocessor] ) ) {

				$css = call_user_func( $preprocessors[$preprocessor]['callback'], $css );

			}

		}

		safecss_class();

		$csstidy = new csstidy();

			return $args;

		}

		if ( isset( $preprocessors[ $preprocessor ] ) ) {

			$args['post_content_filtered'] = $css;

			$args['post_content'] = call_user_func( $preprocessors[ $preprocessor ]['callback'], $css );

		}

		return $args;

	}