65     def add_result(self, future):  argument
68     def add_exception(self, future):  argument
71     def add_cancelled(self, future):  argument
81     def add_result(self, future):  argument
86     def add_exception(self, future):  argument
91     def add_cancelled(self, future):  argument
99     def add_result(self, future):  argument
103     def add_exception(self, future):  argument
107     def add_cancelled(self, future):  argument
126     def add_result(self, future):  argument
130     def add_exception(self, future):  argument
137     def add_cancelled(self, future):  argument