'This method is used when assigning components data to a ``TensMul``
object, it converts components data to a fully contravariant ndarray,
which is then stored according to the ``TensorHead`` key.'

def data_tensorhead_from_tensmul(self, data, tensmul, tensorhead):

    if (data is None):
        return None
    return self._correct_signature_from_indices(data, tensmul.get_indices(), tensmul.free, tensmul.dum, True)
