Subgraph& subgraph = entry.second;
    FixupSourceAndSinkEdges(subgraph.GetGraph());
  }

  if (VLOG_IS_ON(1)) {
    // Dump subgraphs.
    for (auto& entry : subgraphs_) {
      DumpGraphToFile(
          absl::StrCat("encapsulate_subgraphs_subgraph_", entry.first),
          *entry.second.GetGraph(), library);
    }
  }

  return s;
}

Status Encapsulator::BuildFunctionDefs(