private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1.ProductSetPurgeConfig,
            com.google.cloud.vision.v1.ProductSetPurgeConfig.Builder,
            com.google.cloud.vision.v1.ProductSetPurgeConfigOrBuilder>
        getProductSetPurgeConfigFieldBuilder() {
      if (productSetPurgeConfigBuilder_ == null) {
        if (!(targetCase_ == 2)) {
          target_ = com.google.cloud.vision.v1.ProductSetPurgeConfig.getDefaultInstance();
        }
        productSetPurgeConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1.ProductSetPurgeConfig,
                com.google.cloud.vision.v1.ProductSetPurgeConfig.Builder,
                com.google.cloud.vision.v1.ProductSetPurgeConfigOrBuilder>(
                (com.google.cloud.vision.v1.ProductSetPurgeConfig) target_,
                getParentForChildren(),
                isClean());
        target_ = null;
      }
      targetCase_ = 2;
      onChanged();
      return productSetPurgeConfigBuilder_;
    }
<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