NBNSProtocol Class
==================
pysmb has a *NBNSProtocol* implementation for Twisted framework.
This allows you to perform name query asynchronously without having your application to block and wait for the results.
In your project,
1. Create a NBNSProtocol instance.
2. Just call *queryName* method which will return a *Deferred* instance. Add your callback function to the *Deferred* instance via *addCallback* method to receive the results of the name query.
3. When you are done with the NBNSProtocol instance, call its <NBNSProtocol instance>.transport.stopListening method to remove this instance from the reactor.
.. autoclass:: nmb.NetBIOSProtocol.NBNSProtocol
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.. autoclass:: nmb.NetBIOSProtocol.NetBIOSTimeout
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