import com.google.common.annotations.Beta;
import com.google.common.base.Preconditions;
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import java.io.IOException;
import java.util.ArrayDeque;
import java.util.Deque;
import java.util.HashSet;
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-import javax.xml.stream.XMLStreamWriter;
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import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;