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a/application.cpp b/application.cpp
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    CONNECT(player, pause(), playlist, psl_pause());
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    CONNECT(player, pause(), playlist, psl_pause());
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    CONNECT(player, stop(), playlist, psl_stop());
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    CONNECT(player, stop(), playlist, psl_stop());
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    CONNECT(player, forward(), playlist, psl_forward());
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    CONNECT(player, forward(), playlist, psl_forward());
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    CONNECT(player, backward(), playlist, psl_backward());
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    CONNECT(player, backward(), playlist, psl_backward());
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    CONNECT(playlist, sig_track_metadata(const MetaData&, int, bool),
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    CONNECT(playlist, sig_track_metadata(const MetaData&),
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            player, update_track(const MetaData&, int, bool));
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            player, update_track(const MetaData&));
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    CONNECT(playlist, sig_stopped(),  player, stopped());
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    CONNECT(playlist, sig_stopped(),  player, stopped());
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    CONNECT(playlist, sig_paused(),  player, paused());
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    CONNECT(playlist, sig_paused(),  player, paused());
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    CONNECT(playlist, sig_playing(),  player, playing());
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    CONNECT(playlist, sig_playing(),  player, playing());
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    CONNECT(playlist, sig_playing_track_changed(int), 
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    CONNECT(playlist, sig_playing_track_changed(int), 
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            ui_playlist, track_changed(int));
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            ui_playlist, track_changed(int));