public ModifiableDurabilityServiceQosPolicyImpl(DurabilityServiceQosPolicy qos)
: base(qos.GetHistoryKind(),qos.GetServiceCleanupDelay(), qos.GetHistoryDepth(),
qos.GetMaxSamples(),qos.GetMaxInstances(),qos.GetMaxSamplesPerInstance(),qos.GetBootstrap())
{
}