Go\Aop\Support\DeclareParentsAdvisor::validateInterfaces PHP Method

    public function validateInterfaces()
    {
        $refInterface = new ReflectionClass(reset($this->advice->getInterfaces()));
        $refImplementation = new ReflectionClass(reset($this->advice->getTraits()));
        if (!$refInterface->isInterface()) {
            throw new \InvalidArgumentException("Only interface can be introduced");
        }
        if (!$refImplementation->isTrait()) {
            throw new \InvalidArgumentException("Only trait can be used as implementation");
        }
        foreach ($refInterface->getMethods() as $interfaceMethod) {
            if (!$refImplementation->hasMethod($interfaceMethod->name)) {
                throw new \DomainException("Implementation requires method {$interfaceMethod->name}");
            }
        }
    }