def _history_changed ( self ):
        if not self._no_update:
            if self._first_time is None:
                self._first_time = False
                if (self.value == '') and (len( self.history ) > 0):
                    self.value = self.history[0]

            self._load_history( select = False )
Helper to update times
dataset/ETHPy150Open enthought/traitsui/traitsui/wx/history_control.py/HistoryControl._history_changed--crossover with--dataset/ETHPy150Open mne-tools/mne-python/mne/io/base.py/_BaseRaw._update_times