def get_default_value(self):
        val = self.show
        if not val:
            val = self.raw_value
        if not val:
            val = self.showname
        return val
Gets the best 'value' string this field has.
dataset/ETHPy150Open KimiNewt/pyshark/src/pyshark/packet/layer.py/LayerField.get_default_value