Pinq\Expressions\VariableExpression::compileCode PHP Method

    protected function compileCode(&$code)
    {
        if ($this->name instanceof ValueExpression && self::isNormalSyntaxName($this->name->getValue())) {
            $code .= '$' . $this->name->getValue();
        } else {
            $code .= '${';
            $this->name->compileCode($code);
            $code .= '}';
        }
    }