private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Struct,
            com.google.protobuf.Struct.Builder,
            com.google.protobuf.StructOrBuilder>
        getExperimentalConfigFieldBuilder() {
      if (experimentalConfigBuilder_ == null) {
        experimentalConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Struct,
                com.google.protobuf.Struct.Builder,
                com.google.protobuf.StructOrBuilder>(
                getExperimentalConfig(), getParentForChildren(), isClean());
        experimentalConfig_ = null;
      }
      return experimentalConfigBuilder_;
    }
<pre>
Experimental configurations. Structured object containing not-yet-stable
processor parameters.
</pre>

<code>.google.protobuf.Struct experimental_config = 26;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ProcessorConfig.java