private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1.Product,
            com.google.cloud.vision.v1.Product.Builder,
            com.google.cloud.vision.v1.ProductOrBuilder>
        getProductFieldBuilder() {
      if (productBuilder_ == null) {
        productBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1.Product,
                com.google.cloud.vision.v1.Product.Builder,
                com.google.cloud.vision.v1.ProductOrBuilder>(
                getProduct(), getParentForChildren(), isClean());
        product_ = null;
      }
      return productBuilder_;
    }
<pre>
Required. The Product resource which replaces the one on the server.
product.name is immutable.
</pre>

<code>.google.cloud.vision.v1.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/UpdateProductRequest.java