Replace callable tokens with callable names.

        :param call: Encoded callable  name
        :type  call: string

        :rtype: string

def decode_call(self, call):
        """
        Replace callable tokens with callable names.

        :param call: Encoded callable  name
        :type  call: string

        :rtype: string
        """
        # Callable name is None when callable is part of exclude list
        if call is None:
            return None
        itokens = call.split(self._callables_separator)
        odict = {}
        for key, value in self._clut.items():
            if value in itokens:
                odict[itokens[itokens.index(value)]] = key
        return self._callables_separator.join([odict[itoken] for itoken in itokens])