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Migrate lib's `&Option<T>` into `Option<&T>` Trying out my new lint https://github.com/rust-lang/rust-clippy/pull/13336 - according to the [video](https://www.youtube.com/watch?v=6c7pZYP_iIE), this could lead to some performance and memory optimizations. Basic thoughts expressed in the video that seem to make sense: * `&Option<T>` in an API breaks encapsulation: * caller must own T and move it into an Option to call with it * if returned, the owner must store it as Option<T> internally in order to return it * Performance is subject to compiler optimization, but at the basics, `&Option<T>` points to memory that has `presence` flag + value, whereas `Option<&T>` by specification is always optimized to a single pointer.