-import org.opendaylight.yangtools.yang.binding.InstanceIdentifier
-import org.opendaylight.yangtools.yang.binding.DataObject
-import org.opendaylight.controller.sal.topology.IPluginOutTopologyService
-import org.opendaylight.controller.sal.topology.IPluginInTopologyService
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.FlowTopologyDiscoveryService
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.FlowTopologyDiscoveryListener
-import org.opendaylight.controller.sal.core.Edge
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.Link
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkDiscovered
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkOverutilized
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkRemoved
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.topology.discovery.rev130819.LinkUtilizationNormal
-import org.opendaylight.controller.sal.topology.TopoEdgeUpdate
-import org.opendaylight.controller.sal.discovery.IDiscoveryService
-import org.opendaylight.controller.sal.reader.IPluginOutReadService
-import java.util.List
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.OpendaylightFlowStatisticsListener
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.OpendaylightFlowTableStatisticsListener
-import org.opendaylight.yang.gen.v1.urn.opendaylight.port.statistics.rev131214.OpendaylightPortStatisticsListener
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.AggregateFlowStatisticsUpdate
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.FlowsStatisticsUpdate
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.table.statistics.rev131215.FlowTableStatisticsUpdate
-import org.opendaylight.controller.sal.reader.NodeTableStatistics