[geofft]

My initial instinct is to ignore all of that documentation in your screenshot.

Specifically, the first thing, inner(), says that you generally don't have to call it because there's a Deref implementation. Deref is a trait that lets you implement things that loosely resemble smart pointers or similar wrapper types: for instance, CString, which tracks a Rust-owned C-compatible string (null-terminated), has a Deref implementation to an array of bytes. So I know that I can usually use a State<T> when a function seems likely to want an &T or Box<T> or similar, and I can carry on and not care very much more until I need to.

The rest are trait implementations of common traits (Debug is like Python's repr, PartialEq and Eq are comparisons, etc.), and the documentation is from the trait. I think this is a rustdoc weakness, but I know about it, so I can ignore reading the docs.