def free_norm(self, name, free=True, **kwargs):
        """Free/Fix normalization of a source.

        Parameters
        ----------

        name : str
            Source name.

        free : bool
            Choose whether to free (free=True) or fix (free=False).

        """
        name = self.get_source_name(name)
        normPar = self.like.normPar(name).getName()
        self.free_source(name, pars=[normPar], free=free, **kwargs)