    deferred class
    	DISPENSER [G]

    General
    	cluster: base
    	description:
    		"Dispensers: containers for which clients have no say
    		as to what item they can access at a given time.
    		Examples include stacks and queues."

    Ancestors
    	ACTIVE* [G]
    	FINITE* [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: CONTAINER [G])
    	force (v: [like item] G)
    	prune (v: G)
    	prune_all (v: G)
    	put (v: [like item] G)
    	remove
    	replace (v: G)
    	wipe_out

    Constraints
    	readable definition
    	writable definition