Args:
            radio_number: radio number

        Returns: presets for this radio

def get_radio_by_number(self, radio_number) -> 'RadioPresets':
        """
        Args:
            radio_number: radio number

        Returns: presets for this radio
        """
        if self.has_radio_presets:
            if radio_number in FlyingUnit.RadioPresets.radio_enum[self.unit_type].keys():
                return FlyingUnit.RadioPresets(self, radio_number)
            else:
                raise TypeError(
                    'radio number {} for aircraft: {}'.format(radio_number, self.unit_type))
        else:
            raise TypeError('unit #{}: {}'.format(self.unit_id, self.unit_name))