code: public BatchDeletePhoneNumberRequest withPhoneNumberIds(String... phoneNumberIds) {
          if (this.phoneNumberIds == null) {
              setPhoneNumberIds(new java.util.ArrayList<String>(phoneNumberIds.length));
          }
          for (String ele : phoneNumberIds) {
              this.phoneNumberIds.add(ele);
          }
          return this;
      }
docs: <p>
  List of phone number IDs.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPhoneNumberIds(java.util.Collection)} or {@link #withPhoneNumberIds(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param phoneNumberIds
  List of phone number IDs.
  @return Returns a reference to this object so that method calls can be chained together.