public Builder setSchemaKeySortingStrategy(
        com.google.cloud.visionai.v1.SchemaKeySortingStrategy value) {
      if (schemaKeySortingStrategyBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        sortSpec_ = value;
        onChanged();
      } else {
        schemaKeySortingStrategyBuilder_.setMessage(value);
      }
      sortSpecCase_ = 9;
      return this;
    }
<pre>
Sort by the value under the data schema key.
</pre>

<code>.google.cloud.visionai.v1.SchemaKeySortingStrategy schema_key_sorting_strategy = 9;
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/SearchAssetsRequest.java