{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":".flat_map(|(_,"}]}
            .flat_map(|(_, crate_)| self.r.tcx.implementations_of_trait((*crate_, default_trait)))
            // FIXME: This doesn't include impls like `impl Default for String`.
            .filter_map(|(_, simplified_self_ty)| *simplified_self_ty)