PBD::Signal0<void> ControlProtocol::StepTracksUp;
PBD::Signal1<void,StripableNotificationListPtr> ControlProtocol::StripableSelectionChanged;
-PBD::Signal1<void,uint64_t> ControlProtocol::AddStripableSelection;
-PBD::Signal1<void,uint64_t> ControlProtocol::SetStripableSelection;
-PBD::Signal1<void,uint64_t> ControlProtocol::ToggleStripableSelection;
-PBD::Signal0<void> ControlProtocol::ClearStripableSelection;
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const std::string ControlProtocol::state_node_name ("Protocol");