private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.SchemaKeySortingStrategy,
            com.google.cloud.visionai.v1.SchemaKeySortingStrategy.Builder,
            com.google.cloud.visionai.v1.SchemaKeySortingStrategyOrBuilder>
        getSchemaKeySortingStrategyFieldBuilder() {
      if (schemaKeySortingStrategyBuilder_ == null) {
        if (!(sortSpecCase_ == 9)) {
          sortSpec_ = com.google.cloud.visionai.v1.SchemaKeySortingStrategy.getDefaultInstance();
        }
        schemaKeySortingStrategyBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.SchemaKeySortingStrategy,
                com.google.cloud.visionai.v1.SchemaKeySortingStrategy.Builder,
                com.google.cloud.visionai.v1.SchemaKeySortingStrategyOrBuilder>(
                (com.google.cloud.visionai.v1.SchemaKeySortingStrategy) sortSpec_,
                getParentForChildren(),
                isClean());
        sortSpec_ = null;
      }
      sortSpecCase_ = 9;
      onChanged();
      return schemaKeySortingStrategyBuilder_;
    }
<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