//throw Error(_("Not yet implemented"));
/*
assert(value_node->is_exported());
if(get_canvas()->value_node_list().count(old_name))
throw Error(_("A ValueNode with the old ID already exists in this canvas (BUG)"));
//throw Error(_("Not yet implemented"));
/*
assert(value_node->is_exported());
if(get_canvas()->value_node_list().count(old_name))
throw Error(_("A ValueNode with the old ID already exists in this canvas (BUG)"));