Module set 
Source - Difference
 - A lazy iterator producing elements in the difference of 
HashSets. - Drain
 - A draining iterator over the items of a 
HashSet. - ExtractIf
 - A draining iterator over entries of a 
HashSet which don’t satisfy the predicate f. - HashSet
 - A hash set implemented as a 
HashMap where the value is (). - Intersection
 - A lazy iterator producing elements in the intersection of 
HashSets. - IntoIter
 - An owning iterator over the items of a 
HashSet. - Iter
 - An iterator over the items of a 
HashSet. - OccupiedEntry
 - A view into an occupied entry in a 
HashSet.
It is part of the Entry enum. - SymmetricDifference
 - A lazy iterator producing elements in the symmetric difference of 
HashSets. - Union
 - A lazy iterator producing elements in the union of 
HashSets. - VacantEntry
 - A view into a vacant entry in a 
HashSet.
It is part of the Entry enum. 
- Entry
 - A view into a single entry in a set, which may either be vacant or occupied.
 
- assert_covariance 🔒