@java.lang.Override
    public com.google.cloud.visionai.v1.SchemaKeySortingStrategy getSchemaKeySortingStrategy() {
      if (schemaKeySortingStrategyBuilder_ == null) {
        if (sortSpecCase_ == 9) {
          return (com.google.cloud.visionai.v1.SchemaKeySortingStrategy) sortSpec_;
        }
        return com.google.cloud.visionai.v1.SchemaKeySortingStrategy.getDefaultInstance();
      } else {
        if (sortSpecCase_ == 9) {
          return schemaKeySortingStrategyBuilder_.getMessage();
        }
        return com.google.cloud.visionai.v1.SchemaKeySortingStrategy.getDefaultInstance();
      }
    }
<pre>
Sort by the value under the data schema key.
</pre>

<code>.google.cloud.visionai.v1.SchemaKeySortingStrategy schema_key_sorting_strategy = 9;
</code>

@return The schemaKeySortingStrategy.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/SearchAssetsRequest.java