def unload(self, refobj):
        """Load the given refobject

        Unload in this case means, that a reference is stays in the scene
        but it is not in a loaded state.
        So there is a reference, but data is not read from it.

        This will call :meth:`ReftypeInterface.unload`.

        :param refobj: the refobject
        :type refobj: refobj
        :returns: None
        :rtype: None
        :raises: None
        """
        inter = self.get_typ_interface(self.get_typ(refobj))
        ref = self.get_reference(refobj)
        inter.unload(refobj, ref)