{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"infcx.tcx.get_diagnostic_item(sym::IteratorItem),"}]}
            infcx.tcx.get_diagnostic_item(sym::IteratorItem),
            infcx.tcx.get_diagnostic_item(sym::Iterator),
            format_as_assoc,