{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"if"}]}
        if let ast::AssocItemKind::Fn(..) = it.kind {
    fn check_impl_item(&mut self, cx: &EarlyContext<'_>, it: &ast::AssocItem) {
            if let Some(attr) = attr::find_by_name(&it.attrs, sym::no_mangle) {