std::shared_ptr<pv::toolbars::MainBar> main_bar_;
mutable std::mutex sampling_mutex_; //!< Protects access to capture_state_.
capture_state capture_state_;
std::shared_ptr<pv::toolbars::MainBar> main_bar_;
mutable std::mutex sampling_mutex_; //!< Protects access to capture_state_.
capture_state capture_state_;