void redraw_end_xfade_to (boost::shared_ptr<ARDOUR::AudioRegion>, framecnt_t, ArdourCanvas::Points&, double, double, double);
void redraw_start_xfade ();
void redraw_end_xfade ();
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void hide_xfades ();
void hide_start_xfade ();
void hide_end_xfade ();