@classmethod
def default_config(cls, **params):
    """
        Return a :class:`ParameterSet` object holding the default
        model configuration parameters, updated with any values passed on
        as keywords

        Parameters
        ----------
        **params :
            parameter values specified as key/value pairs
        """
    from pyRSD.rsdfit.parameters import Parameter, ParameterSet
    allowed = cls.allowable_kwargs
    model = cls()
    for name in allowed:
        params.setdefault(name, getattr(model, name))
    toret = ParameterSet()
    for name in params:
        toret[name] = Parameter(name=name, value=params[name])
    toret.tag = 'model'
    return toret
