public static com.google.cloud.visionai.v1.SchemaKeySortingStrategy.Option parseFrom(
        java.io.InputStream input) throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
    }
<pre>
Aggregate method for the current data schema key.
</pre>

<code>
optional .google.cloud.visionai.v1.SchemaKeySortingStrategy.Option.AggregateMethod aggregate_method = 3;
</code>

@return The aggregateMethod.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/SchemaKeySortingStrategy.java