{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"///"}]}
/// around `PredicateObligations<'tcx>`, but it has one important property:
/// `InferOk<'tcx, ()>` is used a lot. It may seem like a useless wrapper
/// because `InferOk` is marked with `#[must_use]`, if you have a method