'The unadorned value proxied by this parameter.'

@property
def value(self):

    if (self._model is None):
        raise AttributeError(u'Parameter    definition    does    not    have    a    value')
    value = self._get_model_value(self._model)
    if (self._getter is None):
        return value
    else:
        raw_unit = self._model._param_metrics[self.name][u'raw_unit']
        orig_unit = self._model._param_metrics[self.name][u'orig_unit']
        if (raw_unit is not None):
            return np.float64(self._getter(value, raw_unit, orig_unit).value)
        else:
            return self._getter(value)
