{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"(RePlaceholder(a_p),"}]}
            (RePlaceholder(a_p), RePlaceholder(b_p)) => a_p.bound == b_p.bound,
        |a_region: Region<'tcx>, b_region: Region<'tcx>| match (a_region.kind(), b_region.kind()) {
            _ => a_region == b_region,