    deferred class
    	STACK [G]

    General
    	cluster: base
    	description:
    		"Stacks (last-in, first-out dispensers), without commitment
    		to a particular representation"

    Ancestors
    	DISPENSER* [G]

    Queries
    	changeable_comparison_criterion: BOOLEAN
    	count: INTEGER_32
    	extendible: BOOLEAN
    	full: BOOLEAN
    	has (v: G): BOOLEAN
    	is_empty: BOOLEAN
    	is_inserted (v: G): BOOLEAN
    	item: G
    	linear_representation: LINEAR [G]
    	object_comparison: BOOLEAN
    	occurrences (v: G): INTEGER_32
    	prunable: BOOLEAN
    	readable: BOOLEAN
    	writable: BOOLEAN

    Commands
    	append (s: SEQUENCE [G])
    	compare_objects
    	compare_references
    	extend (v: [like item] G)
    	fill (other: LINEAR [G])
    	force (v: [like item] G)
    	put (v: [like item] G)
    	remove
    	replace (v: [like item] G)
    	wipe_out