public Builder clearSchemaKeySortingStrategy() {
      if (schemaKeySortingStrategyBuilder_ == null) {
        if (sortSpecCase_ == 9) {
          sortSpecCase_ = 0;
          sortSpec_ = null;
          onChanged();
        }
      } else {
        if (sortSpecCase_ == 9) {
          sortSpecCase_ = 0;
          sortSpec_ = null;
        }
        schemaKeySortingStrategyBuilder_.clear();
      }
      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