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Name	Action
..
CSSFunction.php	Edit
Color.php	Edit
PrimitiveValue.php	Edit
RuleValueList.php	Edit
Size.php	Edit
String.php	Edit
URL.php	Edit
Value.php	Edit
ValueList.php	Edit

Editing: Value.php

<?php namespace Sabberworm\CSS\Value; use Sabberworm\CSS\Renderable; abstract class Value implements Renderable { //Methods are commented out because re-declaring them here is a fatal error in PHP < 5.3.9 //public abstract function __toString(); //public abstract function render(\Sabberworm\CSS\OutputFormat $oOutputFormat); }