{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"rhs_is_lit:"}]}
                rhs_is_lit: opt_rhs_expr
                rhs_span: opt_rhs_expr.map(|expr| expr.span),
                    .is_some_and(|expr| matches!(expr.kind, hir::ExprKind::Lit(_))),