https://doc.rust-lang.org/nightly/nightly-rustc/rustc_trait_selection/errors/enum.TypeErrorAdditionalDiags.html
TypeErrorAdditionalDiags in rustc_trait_selection::errors - Rust
API documentation for the Rust `TypeErrorAdditionalDiags` enum in crate `rustc_trait_selection`.
rustctraitselectionerrors