  JsonDocument(JsonDocument &&rhs) noexcept
      : rapidjson::Document(std::move(rhs)) {
    s_pActiveDocument = this;
    rhs.isNil = true;
  }
  JsonDocument(JsonDocument &&rhs) noexcept
      : rapidjson::Document(std::move(rhs)) {
    s_pActiveDocument = this;
    rhs.isNil = true;
  }