public Builder clearInstance() {
        bitField0_ = (bitField0_ & ~0x00000002);
        instance_ = null;
        if (instanceBuilder_ != null) {
          instanceBuilder_.dispose();
          instanceBuilder_ = null;
        }
        onChanged();
        return this;
      }
<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