public Builder clearProduct() {
      bitField0_ = (bitField0_ & ~0x00000001);
      product_ = null;
      if (productBuilder_ != null) {
        productBuilder_.dispose();
        productBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. The Product resource which replaces the one on the server.
product.name is immutable.
</pre>

<code>
.google.cloud.vision.v1p4beta1.Product product = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/UpdateProductRequest.java