Is it possible to access
HashMap::entry() without cloning the key for every access? I know this is necessary for insertions but
entry() forces you to always move the key just in case. This is a problem when using complex (immutable) values as key.
Here's a stripped down usage example: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=01d58c7e0e199e3a9d39e3db322fb1a4