public Builder setProduct(com.google.cloud.vision.v1p3beta1.Product value) {
        if (productBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          product_ = value;
        } else {
          productBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
The Product.
</pre>

<code>.google.cloud.vision.v1p3beta1.Product product = 1;</code>
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/ProductSearchResults.java