code: public void setUpdatePhoneNumberRequestItems(java.util.Collection<UpdatePhoneNumberRequestItem> updatePhoneNumberRequestItems) {
          if (updatePhoneNumberRequestItems == null) {
              this.updatePhoneNumberRequestItems = null;
              return;
          }
  
          this.updatePhoneNumberRequestItems = new java.util.ArrayList<UpdatePhoneNumberRequestItem>(updatePhoneNumberRequestItems);
      }
docs: <p>
  The request containing the phone number IDs and product types to update.
  </p>
  
  @param updatePhoneNumberRequestItems
  The request containing the phone number IDs and product types to update.