[]Type Definition rustc_hir::def_id::DefIdSet

type DefIdSet = HashSet<DefId, BuildHasherDefault<FxHasher>>;
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.