deferred class
	TREE [G]

General
	cluster: elks
	description: "Trees, without commitment to a particular representation"

Ancestors
	CONTAINER* [G]

Queries
	arity: INTEGER_32
	binary_representation: BINARY_TREE [G]
	changeable_comparison_criterion: BOOLEAN
	child: [like parent] detachable TREE [G]
	child_after: BOOLEAN
	child_before: BOOLEAN
	child_capacity: INTEGER_32
	child_cursor: CURSOR
	child_index: INTEGER_32
	child_isfirst: BOOLEAN
	child_islast: BOOLEAN
	child_item: [like item] G
	child_off: BOOLEAN
	child_readable: BOOLEAN
	child_writable: BOOLEAN
	count: INTEGER_32
	first_child: [like parent] detachable TREE [G]
	has (v: G): BOOLEAN
	is_empty: BOOLEAN
	is_equal (other: [like Current] TREE [G]): BOOLEAN
	is_leaf: BOOLEAN
	is_root: BOOLEAN
	is_sibling (other: [attached like parent] attached TREE [G]): BOOLEAN
	item: G
	last_child: [like first_child] detachable TREE [G]
	left_sibling: [like parent] detachable TREE [G]
	linear_representation: LINEAR [G]
	new_cursor: TREE_ITERATION_CURSOR [G]
	node_is_equal (other: [like Current] TREE [G]): BOOLEAN
	object_comparison: BOOLEAN
	parent: detachable TREE [G]
	Readable: BOOLEAN
	readable_child: BOOLEAN
	right_sibling: [like parent] detachable TREE [G]
	valid_cursor_index (i: INTEGER_32): BOOLEAN
	Writable: BOOLEAN
	writable_child: BOOLEAN

Commands
	child_back
	child_finish
	child_forth
	child_go_i_th (i: INTEGER_32)
	child_go_to (p: CURSOR)
	child_put (v: [like item] G)
	child_replace (v: [like item] G)
	child_start
	compare_objects
	compare_references
	copy (other: [like Current] TREE [G])
	forget_left
	forget_right
	prune (n: [like Current] TREE [G])
	put (v: [like item] G)
	put_child (n: [like parent] detachable TREE [G])
	replace (v: [like item] G)
	replace_child (n: [like parent] detachable TREE [G])
	sprout
	wipe_out

Constraints
	tree consistency
	leaf definition
	child off definition
	child before definition
	child isfirst definition
	child islast definition
	child after definition

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