@property
    def first_lower(self):
        return self.tok[0].islower()
Handles the 'value' trait being changed.
dataset/ETHPy150Open reefeed/wanish/wanish/tokenizers.py/PunktToken.first_lower--crossover with--dataset/ETHPy150Open enthought/traitsui/traitsui/wx/history_control.py/HistoryControl._value_changed