https://doc.rust-lang.org/beta/nightly-rustc/rustc_middle/queries/coerce_unsized_info/type.ProvidedValue.html
ProvidedValue in rustc_middle::queries::coerce_unsized_info - Rust
Type returned from query providers and loaded from disk-cache.
rustcmiddlequeriescoerceinfo
https://doc.rust-lang.org/beta/nightly-rustc/rustc_middle/queries/coerce_unsized_info/type.LocalKey.html
LocalKey in rustc_middle::queries::coerce_unsized_info - Rust
Key type used by provider functions in `local_providers`. This query has the `separate_provide_extern` modifier.
rustcmiddlequeriescoerceinfo