import static org.junit.Assert.assertNull;
import java.io.Closeable;
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import javax.annotation.Nullable;
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import org.opendaylight.controller.config.api.ModuleIdentifier;
import org.opendaylight.controller.config.api.RuntimeBeanRegistratorAwareModule;
import org.opendaylight.controller.config.api.runtime.RootRuntimeBeanRegistrator;