private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.Operator,
            com.google.cloud.visionai.v1.Operator.Builder,
            com.google.cloud.visionai.v1.OperatorOrBuilder>
        getOperatorFieldBuilder() {
      if (operatorBuilder_ == null) {
        operatorBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.Operator,
                com.google.cloud.visionai.v1.Operator.Builder,
                com.google.cloud.visionai.v1.OperatorOrBuilder>(
                getOperator(), getParentForChildren(), isClean());
        operator_ = null;
      }
      return operatorBuilder_;
    }
<pre>
Required. The resource being updated
</pre>

<code>
.google.cloud.visionai.v1.Operator operator = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UpdateOperatorRequest.java