# std shims A crate which passes through to std when the default `std` feature is enabled, yet provides a series of shims when it isn't. No guarantee of one-to-one parity is provided. The shims provided aim to be sufficient for the average case. `HashSet` and `HashMap` are provided via `hashbrown`. Synchronization primitives are provided via `spin` (avoiding a requirement on `critical-section`). types are not guaranteed to be