{"ast_node_type":"function","tokens":[{"end":85,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_lit(hir_id: rustc_hir::HirId, a: rustc_hir::Lit, negated: bool);
            fn check_pat(a: &'tcx rustc_hir::Pat<'tcx>);
            fn check_expr(a: &'tcx rustc_hir::Expr<'tcx>);