{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":".impl_of_assoc(def_id.to_def_id())"}]}
                .impl_of_assoc(def_id.to_def_id())
            let is_associated_item_in_trait_impl = tcx
                .and_then(|impl_id| tcx.trait_id_of_impl(impl_id))