FOF30\Less\Parser\Parser::propertyValue PHP Method

    public function propertyValue(&$value, $keyName = null)
    {
        $values = array();
        if ($keyName !== null) {
            $this->env->currentProperty = $keyName;
        }
        $s = null;
        while ($this->expressionList($v)) {
            $values[] = $v;
            $s = $this->seek();
            if (!$this->literal(',')) {
                break;
            }
        }
        if ($s) {
            $this->seek($s);
        }
        if ($keyName !== null) {
            unset($this->env->currentProperty);
        }
        if (count($values) == 0) {
            return false;
        }
        $value = Less::compressList($values, ', ');
        return true;
    }

 /**
  * Inject array of unparsed strings into environment as variables
  *
  * @param   type  $args  X
  *
  * @return  void
  *
  * @throws  \Exception
  */
 protected function injectVariables($args)
 {
     $this->pushEnv();
     /** FOF -- BEGIN CHANGE * */
     $parser = new Parser($this, __METHOD__);
     /** FIF -- END CHANGE * */
     foreach ($args as $name => $strValue) {
         if ($name[0] != '@') {
             $name = '@' . $name;
         }
         $parser->count = 0;
         $parser->buffer = (string) $strValue;
         if (!$parser->propertyValue($value)) {
             throw new \Exception("failed to parse passed in variable {$name}: {$strValue}");
         }
         $this->set($name, $value);
     }
 }