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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def in_function_call(self):
 """Return either completion information or a call signature for the function definition that we are on currently."""

        #The last thing to do before we can form completions etc. is perform
        #a real-time update of the in-memory versions of the modules.
        if settings.real_time_update:
            cache.rt.update(self._user_context)

        return self._evaluator.in_function_call()