docs: public ListDomainAssociationsResult withDomainAssociations(DomainAssociation... domainAssociations) {
          if (this.domainAssociations == null) {
              setDomainAssociations(new java.util.ArrayList<DomainAssociation>(domainAssociations.length));
          }
          for (DomainAssociation ele : domainAssociations) {
              this.domainAssociations.add(ele);
          }
          return this;
      }