pe_order_same_node  904 pengine/container.c                                             pe_order_optional|pe_order_same_node, data_set);
pe_order_same_node  580 pengine/graph.c         if (is_set(other->type, pe_order_same_node) && first_node && then_node
pe_order_same_node 1405 pengine/native.c                                 pe_order_optional|pe_order_same_node, data_set);
pe_order_same_node 1409 pengine/native.c                                 pe_order_implies_then_on_node|pe_order_same_node,