{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"Downcast(_,"}]}
            Downcast(_, idx) => crate::mir::ProjectionElem::Downcast(idx.stable(tables, cx)),
            // found at https://github.com/rust-lang/rust/pull/117517#issuecomment-1811683486
            OpaqueCast(ty) => crate::mir::ProjectionElem::OpaqueCast(ty.stable(tables, cx)),