src/Knp/Menu/Twig/MenuExtension.php
public function isCurrent(ItemInterface $item)
    {
        if (null === $this->matcher) {
            throw new \BadMethodCallException('The matcher must be set to get the breadcrumbs array');
        }

        return $this->matcher->isCurrent($item);
    }
public function isCurrent(ItemInterface $item)
    {
        if (null === $this->matcher) {
            throw new \BadMethodCallException('The matcher must be set to get the breadcrumbs array');
        }

        return $this->matcher->isCurrent($item);
    }
Checks whether an item is current.

@param ItemInterface $item

@return boolean