def register(self, app, options):
        self.app = app
        self.register_options = options or {}
        for deferred in self.deferred_functions:
            deferred(self)
Returns the number of bytes available for reading without blocking.
dataset/ETHPy150Open zeaphoo/cocopot/cocopot/blueprints.py/Blueprint.register--crossover with--dataset/ETHPy150Open scalyr/scalyr-agent-2/scalyr_agent/platform_windows.py/PipeRedirectorClient.ClientChannel.peek