A hash set implemented as a HashMap where the value is ().
| Difference | 
 A lazy iterator producing elements in the difference of   | 
| Drain | 
 A draining iterator over the items of a   | 
| HashSet | 
 A hash set implemented as a   | 
| Intersection | 
 A lazy iterator producing elements in the intersection of   | 
| IntoIter | 
 An owning iterator over the items of a   | 
| Iter | 
 An iterator over the items of a   | 
| SymmetricDifference | 
 A lazy iterator producing elements in the symmetric difference of   | 
| Union | 
 A lazy iterator producing elements in the union of   | 
    © 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
    https://doc.rust-lang.org/std/collections/hash_set/index.html