code: 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;
      }
docs: <p>
  A list of email addresses that ACM used to send domain validation emails.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setValidationEmails(java.util.Collection)} or {@link #withValidationEmails(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param validationEmails
  A list of email addresses that ACM used to send domain validation emails.
  @return Returns a reference to this object so that method calls can be chained together.