docs: public void marshall(UpdateContactRequest updateContactRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (updateContactRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(updateContactRequest.getContactArn(), CONTACTARN_BINDING);
              protocolMarshaller.marshall(updateContactRequest.getDisplayName(), DISPLAYNAME_BINDING);
              protocolMarshaller.marshall(updateContactRequest.getFirstName(), FIRSTNAME_BINDING);
              protocolMarshaller.marshall(updateContactRequest.getLastName(), LASTNAME_BINDING);
              protocolMarshaller.marshall(updateContactRequest.getPhoneNumber(), PHONENUMBER_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }