code: public com.google.api.ads.adwords.axis.v201809.cm.DisplayCallToAction getDisplayCallToAction() {
          return displayCallToAction;
      }
docs: Gets the displayCallToAction value for this ProductImage.
  
  @return displayCallToAction   * Display-call-to-action of the product image. The DisplayCallToAction.textColor
  field cannot be
  set when setting this field.