docs: public DomainValidation withValidationEmails(String... validationEmails) {
          if (this.validationEmails == null) {
              setValidationEmails(new java.util.ArrayList<String>(validationEmails.length));
          }
          for (String ele : validationEmails) {
              this.validationEmails.add(ele);
          }
          return this;
      }