- Member sigc::signal_base::block (bool should_block=true) noexcept
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- Member sigc::signal_base::blocked () const noexcept
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- Member sigc::signal_base::unblock () noexcept
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- Class sigc::track_obj_functor< T_functor, T_obj >
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- Member sigc::track_obj (const T_functor & func, const T_obj &... obj)
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