private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.ProductRecognizerConfig,
            com.google.cloud.visionai.v1.ProductRecognizerConfig.Builder,
            com.google.cloud.visionai.v1.ProductRecognizerConfigOrBuilder>
        getProductRecognizerConfigFieldBuilder() {
      if (productRecognizerConfigBuilder_ == null) {
        if (!(processorConfigCase_ == 21)) {
          processorConfig_ =
              com.google.cloud.visionai.v1.ProductRecognizerConfig.getDefaultInstance();
        }
        productRecognizerConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.ProductRecognizerConfig,
                com.google.cloud.visionai.v1.ProductRecognizerConfig.Builder,
                com.google.cloud.visionai.v1.ProductRecognizerConfigOrBuilder>(
                (com.google.cloud.visionai.v1.ProductRecognizerConfig) processorConfig_,
                getParentForChildren(),
                isClean());
        processorConfig_ = null;
      }
      processorConfigCase_ = 21;
      onChanged();
      return productRecognizerConfigBuilder_;
    }
<pre>
Runtime configs of Product Recognizer processor.
</pre>

<code>.google.cloud.visionai.v1.ProductRecognizerConfig product_recognizer_config = 21;
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ProcessorConfig.java