core.registered_on_formspec_input, core.register_on_formspec_input = make_registration()
core.registered_on_dignode, core.register_on_dignode = make_registration()
core.registered_on_punchnode, core.register_on_punchnode = make_registration()
+core.registered_on_placenode, core.register_on_placenode = make_registration()