{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"(self.tcx.is_diagnostic_item(sym::Option,"}]}
                (self.tcx.is_diagnostic_item(sym::Option, def.did())
            ty::Adt(def, _) => {
                    || self.tcx.is_diagnostic_item(sym::Result, def.did()))