{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"if"}]}
        if let hir::TraitItemKind::Fn(sig, body) = item.kind
    fn check_trait_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::TraitItem<'tcx>) {
            && let hir::IsAsync::Async(async_span) = sig.header.asyncness