{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"RegionPredicate(WhereRegionPredicate<'hir>),"}]}
    RegionPredicate(WhereRegionPredicate<'hir>),
    /// A lifetime predicate (e.g., `'a: 'b + 'c`).
    /// An equality predicate (unsupported).