Operations you can perform on sets include: adding objects, retrieving objects, searching a set to see if objects are members, and counting the number of objects in the set.
Use an instance of TDiskSetIterator to step through each object stored in a TDiskSet. Like TDiskDictionaryIterator, this iterator is different from the other iterators in collection classes. Clients of TDiskDictionaryIterator are responsible for deleting items returned by the iterator. Instantiate an iterator by providing a TDiskSet instance in the constructor.
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