public function prepare(
        ExampleNode $example,
        Specification $context,
        MatcherManager $matchers,
        CollaboratorManager $collaborators
    ) {
        if ($example->getSpecification()->getClassReflection()->hasMethod('let')) {
            $this->parameterValidator->validate($example->getSpecification()->getClassReflection()->getMethod('let'));
        }
        $this->parameterValidator->validate($example->getFunctionReflection());
        return $this;
    }