public Builder clearProductSetPurgeConfig() {
      if (productSetPurgeConfigBuilder_ == null) {
        if (targetCase_ == 2) {
          targetCase_ = 0;
          target_ = null;
          onChanged();
        }
      } else {
        if (targetCase_ == 2) {
          targetCase_ = 0;
          target_ = null;
        }
        productSetPurgeConfigBuilder_.clear();
      }
      return this;
    }
<pre>
Specify which ProductSet contains the Products to be deleted.
</pre>

<code>.google.cloud.vision.v1.ProductSetPurgeConfig product_set_purge_config = 2;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/PurgeProductsRequest.java