251
252            // Return the sibling if its eviction can be considered. Provide the "descendant count
253            // limit" string either way, as the caller may decide not to do sibling eviction.
254            return std::make_pair(strprintf("tx %u (wtxid=%s) would exceed descendant count limit",
255                                            parent_entry.GetSharedTx()->GetHash().ToString(),
256                                            parent_entry.GetSharedTx()->GetWitnessHash().ToString()),
257                                  consider_sibling_eviction ? (*descendants.begin())->GetSharedTx() : nullptr);
258        }
259    }
260    return std::nullopt;
261}
262