Evernote\Client::isBusinessUser PHP Method

    public function isBusinessUser()
    {
        if (null === $this->isBusinessUser) {
            try {
                $user = $this->getAdvancedClient()->getUserStore()->getUser($this->token);
            } catch (\Exception $e) {
                throw ExceptionFactory::create($e);
            }
            $this->isBusinessUser = $user->accounting->businessId !== null;
        }
        return $this->isBusinessUser;
    }