def without(self, *params) -> Identifier:
    'Returns an identifier without `params`.'
    return Identifier(self.name, self.index, **{k: v for (k, v) in self.parameters.items() if (k not in set(params))})
Returns an identifier without `params`.
def without(self, *params) -> Identifier:
    
    return Identifier(self.name, self.index, **{k: v for (k, v) in self.parameters.items() if (k not in set(params))})