docs: public DomainAssociation withSubDomains(SubDomain... subDomains) {
          if (this.subDomains == null) {
              setSubDomains(new java.util.ArrayList<SubDomain>(subDomains.length));
          }
          for (SubDomain ele : subDomains) {
              this.subDomains.add(ele);
          }
          return this;
      }