code: def _get_callable_from_trace_tuple(
          self, trace_tuple: TraceTuple
      ) -> Tuple[str, str]:
          
          trace_frame = trace_tuple.trace_frame
          if trace_tuple.placeholder:
              return trace_frame.caller, trace_frame.caller_port
          return trace_frame.callee, trace_frame.callee_port
docs: Returns either (caller, caller_port) or (callee, callee_port).