code: public java.util.List<String> getPhoneNumbers() {
          if (phoneNumbers == null) {
              phoneNumbers = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return phoneNumbers;
      }
docs: <p>
  A list of phone numbers that are opted out of receiving SMS messages. The list is paginated, and each page can
  contain up to 100 phone numbers.
  </p>
  
  @return A list of phone numbers that are opted out of receiving SMS messages. The list is paginated, and each
  page can contain up to 100 phone numbers.