private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.Application,
            com.google.cloud.visionai.v1.Application.Builder,
            com.google.cloud.visionai.v1.ApplicationOrBuilder>
        getApplicationFieldBuilder() {
      if (applicationBuilder_ == null) {
        applicationBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.Application,
                com.google.cloud.visionai.v1.Application.Builder,
                com.google.cloud.visionai.v1.ApplicationOrBuilder>(
                getApplication(), getParentForChildren(), isClean());
        application_ = null;
      }
      return applicationBuilder_;
    }
<pre>
Required. The resource being updated.
</pre>

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