-local getchar = (Dnode ~= node) and Dnode.getchar or function(n) return n.char end
-
-local nullfunc = function(n) return n end
-local to_node = (Dnode ~= node) and Dnode.tonode or nullfunc
-local to_direct = (Dnode ~= node) and Dnode.todirect or nullfunc
-
-local node_traverse = Dnode.traverse
-local node_new = Dnode.new
-local node_next = (Dnode ~= node) and Dnode.getnext or node.next
-local node_remove = Dnode.remove
-local node_free = Dnode.free
-local has_attr = Dnode.has_attribute
-local set_attr = Dnode.set_attribute
+local getchar = node.direct.getchar
+
+local to_node = node.direct.tonode
+local to_direct = node.direct.todirect
+
+local node_traverse = node.direct.traverse
+local node_new = node.direct.new
+local node_next = node.direct.getnext
+local node_remove = node.direct.remove
+local node_free = node.direct.free
+local has_attr = node.direct.has_attribute
+local set_attr = node.direct.set_attribute