InputFilter is created twice

[ivan-wolf]

Please consider the following code from ValidatiorHandler:

    private function getInputFilter($inputFilterService)
    {
        $inputFilter = $this->inputFilterManager->get($inputFilterService);

        if (! $inputFilter instanceof InputFilter) {
            throw new ValidationClassNotExists(
                sprintf(
                    'Listed input filter "%s" does not exist; cannot validate request',
                    $inputFilterService
                )
            );
        }

        return $this->inputFilterManager->get($inputFilterService);
    }

In the return statement, there's no need to get the input filter again from the manager. We can just return $inputFilter.