{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
        let imports = tcx.used_trait_imports(item_def_id);
    for item_def_id in tcx.hir_body_owners() {
        debug!("GatherVisitor: item_def_id={:?} with imports {:#?}", item_def_id, imports);