{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"ptr.cast::<ty::RegionKind<'tcx>>().as_ref(),"}]}
                    ptr.cast::<ty::RegionKind<'tcx>>().as_ref(),
                REGION_TAG => GenericArgKind::Lifetime(ty::Region(Interned::new_unchecked(
                ))),