Method queryTraceTaskRegExp

bolt/core/QueryConfig.h:1322–1325

    // The default query trace dir, empty by default.
    return get<std::string>(kQueryTraceDir, "");
  }

  std::string queryTraceNodeIds() const {
    // The default query trace nodes, empty by default.
    return get<std::string>(kQueryTraceNodeIds, "");
  }