Test helper for tracking callbacks and their order.

Method __init__ Undocumented
Method call1 Undocumented
Method call2 Undocumented
Method call3 Undocumented
def __init__(self):
Undocumented
def call1(self, object):
Undocumented
def call2(self, object):
Undocumented
def call3(self, object):
Undocumented
API Documentation for twisted, generated by pydoctor at 2020-03-25 17:34:30.