Initialize this class with the specified :class:`flask.Flask` application

        :param app: The Flask application.

def init_app(self, app):
        """
        Initialize this class with the specified :class:`flask.Flask` application

        :param app: The Flask application.
        """

        self.__app = app
        self.__app.before_first_request(self.__setup)

        self.tracer.enabled = self.__app.config.get('TRACE_ENABLED', self.tracer.enabled)