DependencyInjection/Compiler/ConverterPass.php
protected function getRealValue(ContainerBuilder $container, $value)
    {
        return 0 === strpos($value, '%') ? $container->getParameter(trim($value, '%')) : $value;
    }
protected function getRealValue(ContainerBuilder $container, $value)
    {
        return 0 === strpos($value, '%') ? $container->getParameter(trim($value, '%')) : $value;
    }
protected function getRealValue ( ContainerBuilder $ container , $ value ) { return 0 === strpos ( $ value , '%' ) ? $ container -> getParameter ( trim ( $ value , '%' ) ) : $ value ; }
Get the real value.

@param ContainerBuilder $container The container
@param mixed            $value     The value or parameter name

@return mixed
Get the real value .