Custom hints, these options come straight from the Rust Analyzer manual. Check it out for more hints and for other things R-A can do for you!
"rust-analyzer.hover.actions.references.enable": true,
"rust-analyzer.diagnostics.experimental.enable": false,
// can show you if you get references or owned data when you match
"rust-analyzer.inlayHints.bindingModeHints.enable": true,
"rust-analyzer.inlayHints.closingBraceHints.minLines": 25,