private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.visionai.v1.Instance,
              com.google.cloud.visionai.v1.Instance.Builder,
              com.google.cloud.visionai.v1.InstanceOrBuilder>
          getInstanceFieldBuilder() {
        if (instanceBuilder_ == null) {
          instanceBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.visionai.v1.Instance,
                  com.google.cloud.visionai.v1.Instance.Builder,
                  com.google.cloud.visionai.v1.InstanceOrBuilder>(
                  getInstance(), getParentForChildren(), isClean());
          instance_ = null;
        }
        return instanceBuilder_;
      }
<pre>
Required. The resource being updated.
</pre>

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