src/Controller/ControllerResolver.php
public function getController(Request $request)
    {
        if (! $controller = $request->attributes->get('_controller')) {
            throw new \LogicException(sprintf(
                'Controller for URI "%s" could not be found because the "_controller" parameter is missing.',
                $request->getPathInfo()
            ));
        }

        try {
            return $this->callableResolver->resolve($controller);
        } catch (NotCallableException $e) {
            throw new \InvalidArgumentException(sprintf(
                'Controller for URI "%s" is not callable: %s',
                $request->getPathInfo(),
                $e->getMessage()
            ));
        }
    }
public function getController(Request $request)
    {
        if (! $controller = $request->attributes->get('_controller')) {
            throw new \LogicException(sprintf(
                'Controller for URI "%s" could not be found because the "_controller" parameter is missing.',
                $request->getPathInfo()
            ));
        }

        try {
            return $this->callableResolver->resolve($controller);
        } catch (NotCallableException $e) {
            throw new \InvalidArgumentException(sprintf(
                'Controller for URI "%s" is not callable: %s',
                $request->getPathInfo(),
                $e->getMessage()
            ));
        }
    }
{@inheritdoc}