Get the details on a given function.

def get(self, func_name, qualifier=None):
        """Get the details on a given function."""
        project = self.session.get_default_project()
        func_name = "projects/{}/locations/{}/functions/{}".format(
            project, self.region, func_name)
        try:
            return self.client.execute_query('get', {'name': func_name})
        except errors.HttpError as e:
            if e.resp.status != 404:
                raise