{"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"opt_rhs:"}]}
        opt_rhs: Option<(&'tcx hir::Expr<'tcx>, Ty<'tcx>)>,
        (lhs_expr, lhs_ty): (&'tcx hir::Expr<'tcx>, Ty<'tcx>),
        (opname, trait_did): (Symbol, Option<hir::def_id::DefId>),