def for_application(self, id, secret_key, api_version=None):
        """
        Initialize GraphAPI with an OAuth access token for an application.

        :param id: An integer describing a Facebook application.
        :param secret_key: A String describing the Facebook application's secret key.
        """
        from facepy.utils import get_application_access_token

        access_token = get_application_access_token(id, secret_key, api_version=api_version)
        return GraphAPI(access_token, version=api_version)
Initialize GraphAPI with an OAuth access token for an application.

        :param id: An integer describing a Facebook application.
        :param secret_key: A String describing the Facebook application's secret key.