into_inner

[vbfox]

https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv

When a type wraps a single value to associate it with higher-level semantics, access to the wrapped value should be provided by an into_inner() method. This applies to wrappers that provide buffering like BufReader, encoding or decoding like GzDecoder, atomic access like AtomicBool, or any similar semantics.