docs: public ListDomainNamesResult withDomainNames(DomainInfo... domainNames) {
          if (this.domainNames == null) {
              setDomainNames(new java.util.ArrayList<DomainInfo>(domainNames.length));
          }
          for (DomainInfo ele : domainNames) {
              this.domainNames.add(ele);
          }
          return this;
      }