def call(self, code, line, callee_file_timing, callee, duration, frame):
        """
        A call originating from this file returned.

        code (code)
          caller's code object
        line (int)
          caller's line number
        callee_file_timing (FileTiming)
          callee's FileTiming
        callee (code)
          callee's code object
        duration (float)
          duration of the call, in seconds
        frame (frame)
          calle's entire frame as of its return
        """
        try:
            entry = self.call_dict[(code, line, callee)]
        except KeyError:
            self.call_dict[(code, line, callee)] = [callee_file_timing, 1, duration]
        else:
            entry[1] += 1
            entry[2] += duration