private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.IndexEndpoint,
            com.google.cloud.visionai.v1.IndexEndpoint.Builder,
            com.google.cloud.visionai.v1.IndexEndpointOrBuilder>
        getIndexEndpointFieldBuilder() {
      if (indexEndpointBuilder_ == null) {
        indexEndpointBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.IndexEndpoint,
                com.google.cloud.visionai.v1.IndexEndpoint.Builder,
                com.google.cloud.visionai.v1.IndexEndpointOrBuilder>(
                getIndexEndpoint(), getParentForChildren(), isClean());
        indexEndpoint_ = null;
      }
      return indexEndpointBuilder_;
    }
<pre>
Required. The resource being updated.
</pre>

<code>
.google.cloud.visionai.v1.IndexEndpoint index_endpoint = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UpdateIndexEndpointRequest.java