Does Rust define collection traits for abstract interfaces like Set, Map, and Queue like Java's Collections interfaces? I don't see any in the std::collections documentation. Standardizing those APIs in the std lib seems as (or more!) important than providing concrete implementations like BTreeMap. I see some 2015 discussion about missing collections traits:

https://internals.rust-lang.org/t/collection-traits-take-2/1...

https://internals.rust-lang.org/t/traits-that-should-be-in-s...

For comparison, here are Java's core collection interfaces: Collection, Set, SortedSet, List, Queue, Deque, Map, and SortedMap.

http://docs.oracle.com/javase/tutorial/collections/interface...