{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"self.arena.alloc(hir::QPath::LangItem(lang_item,"}]}
            self.arena.alloc(hir::QPath::LangItem(lang_item, self.lower_span(span))),
        hir::ExprKind::Struct(
            fields,