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     +-,-----+
     V       |
>>-[---index-+-]-----------------------------------------------><

Returns the item associated with the specified [index] or [index] es. If the collection has no item associated with the specified [index] or [index] es, this method returns the Nil object. This is an abstract method that must be implemented by a subclasses.

Read Me - Common Public License V1.0 - Copyright Notice(©)