private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.VertexCustomConfig,
            com.google.cloud.visionai.v1.VertexCustomConfig.Builder,
            com.google.cloud.visionai.v1.VertexCustomConfigOrBuilder>
        getVertexCustomConfigFieldBuilder() {
      if (vertexCustomConfigBuilder_ == null) {
        if (!(processorConfigCase_ == 17)) {
          processorConfig_ = com.google.cloud.visionai.v1.VertexCustomConfig.getDefaultInstance();
        }
        vertexCustomConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.VertexCustomConfig,
                com.google.cloud.visionai.v1.VertexCustomConfig.Builder,
                com.google.cloud.visionai.v1.VertexCustomConfigOrBuilder>(
                (com.google.cloud.visionai.v1.VertexCustomConfig) processorConfig_,
                getParentForChildren(),
                isClean());
        processorConfig_ = null;
      }
      processorConfigCase_ = 17;
      onChanged();
      return vertexCustomConfigBuilder_;
    }
<pre>
Configs of Vertex Custom processor.
</pre>

<code>.google.cloud.visionai.v1.VertexCustomConfig vertex_custom_config = 17;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ProcessorConfig.java