{
public:
virtual ~Source () { }
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+
typedef boost::shared_ptr<Sink<T> > SinkPtr;
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/// Adds an output to this source. All data generated is forwarded to \a output
virtual void add_output (SinkPtr output) = 0;
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/// Removes all outputs added
virtual void clear_outputs () = 0;
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/// Removes a specific output from this source
virtual void remove_output (SinkPtr output) = 0;
};