public function getContentKeyAuthorizationPolicyOption($contentKeyAuthorizationOptions)
    {
        $contentKeyAuthorizationOptionsId = Utilities::getEntityId(
            $contentKeyAuthorizationOptions,
            'WindowsAzure\MediaServices\Models\ContentKeyAuthorizationPolicyOption'
        );

        return ContentKeyAuthorizationPolicyOption::createFromOptions(
            $this->_getEntity("ContentKeyAuthorizationPolicyOptions('{$contentKeyAuthorizationOptionsId}')")
        );
    }