code: public com.google.api.ads.adwords.axis.v201809.cm.AppPaymentModelAppPaymentModelType getAppPaymentModelType() {
          return appPaymentModelType;
      }
docs: Gets the appPaymentModelType value for this AppPaymentModel.
  
  @return appPaymentModelType   * <span class="constraint ReadOnly">This field is read only and
  will be ignored when sent to the API.</span>