public Builder mergeProductSetPurgeConfig(
        com.google.cloud.vision.v1.ProductSetPurgeConfig value) {
      if (productSetPurgeConfigBuilder_ == null) {
        if (targetCase_ == 2
            && target_ != com.google.cloud.vision.v1.ProductSetPurgeConfig.getDefaultInstance()) {
          target_ =
              com.google.cloud.vision.v1.ProductSetPurgeConfig.newBuilder(
                      (com.google.cloud.vision.v1.ProductSetPurgeConfig) target_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          target_ = value;
        }
        onChanged();
      } else {
        if (targetCase_ == 2) {
          productSetPurgeConfigBuilder_.mergeFrom(value);
        } else {
          productSetPurgeConfigBuilder_.setMessage(value);
        }
      }
      targetCase_ = 2;
      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