{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
            // found at https://github.com/rust-lang/rust/pull/117517#issuecomment-1811683486
            // dropped when converting to Stable MIR. A brief justification for this decision can be
            Downcast(_, idx) => crate::mir::ProjectionElem::Downcast(idx.stable(tables, cx)),