testing
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@@ -38,10 +38,10 @@ public interface Set<E> extends Iterable<E> {
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/**
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* returns the set resulting from adding the specified element to this set.
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*
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* @param element an element (must not be null)
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* @param elem an element (must not be null)
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* @return the set resulting from adding the specified element to this set.
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*/
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Set<E> add(E element);
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Set<E> add(E elem);
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/**
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* Returns the intersection of this set and the specified set.
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