    deferred class
    	EV_TREE_NODE_LIST_I

    Ancestors
    	EV_ITEM_LIST_I* [reference G -> EV_ITEM]

    Descendants
    	EV_TREE_I*
    	EV_TREE_ITEM_I*
    	EV_TREE_NODE_I*

    Clients
    	EV_TREE_NODE_LIST*
    	EV_TREE_NODE_LIST_I*

    Suppliers
    	ANY
    	ARRAYED_LIST [G]
    	BOOLEAN
    	EV_ITEM_LIST* [reference G -> EV_ITEM]
    	EV_TREE_NODE*
    	EV_TREE_NODE_I*
    	EV_TREE_NODE_LIST_I*
    	PROCEDURE [BASE_TYPE, OPEN_ARGS -> TUPLE create default_create end]