https://www.reddit.com/r/rust/comments/5u6e6f/graphical_depiction_of_ownership_and_borrowing_in/
https://rufflewind.com/2017-02-15/rust-move-copy-borrow

https://internals.rust-lang.org/t/borrow-visualizer-for-the-rust-language-service/4187

http://erik.vestera.as/rustvis/specs
http://erik.vestera.as/rustvis/presentation