2724                     def buffer_callback(obj):  function
2727                                        buffer_callback=buffer_callback)
2746                                buffer_callback=[].append)
2749                 buffer_callback = lambda pb: buffers.append(pb.raw())  function
2751                                   buffer_callback=buffer_callback)
2786             buffer_callback = buffers.append
2787             data = self.dumps(obj, proto, buffer_callback=buffer_callback)
2802         def buffer_callback(buffers):  function
2806             self.dumps(pb, 5, buffer_callback=buffer_callback)
2811             data = self.dumps(pb, proto, buffer_callback=[].append)
2821             data_pickled = self.dumps(1, proto, buffer_callback=None)
2841                 buffer_callback = lambda _: True  function
2842                 data = self.dumps(arr, proto, buffer_callback=buffer_callback)
2848                 buffer_callback = buffers.append
2849                 data = self.dumps(arr, proto, buffer_callback=buffer_callback)
3205                       buffer_callback=[].append)
3208             buffer_callback = buffers.append
3210                          buffer_callback=buffer_callback)