import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
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import java.io.ByteArrayOutputStream;
import java.util.LinkedHashSet;
import java.util.Set;
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import org.apache.avro.Schema;
import org.apache.avro.Schema.Field;
import org.apache.avro.Schema.Type;