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       IN PYTHON SUBPROCESS          #             IN IDLE PROCESS
                                     #
                                     #        oid='gui_adapter'
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                 | GUIProxy |--remote#call-->| GUIAdapter |--calls-->| GUI |
+-----+--calls-->+----------+        #       +------------+          +-----+
| Idb |                               #                             /
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                | IdbAdapter |<--remote#call--| IdbProxy |
                +------------+         #      +----------+
                oid='idb_adapter'      #

The purpose of the Proxy and Adapter classes is to translate certain
arguments and return values that cannot be transported through the RPC
barrier, in particular frame and traceback objects.

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