sigc::signal<void, FormatPtr> FormatEdited;
sigc::signal<void, FormatPtr> FormatRemoved;
sigc::signal<FormatPtr, FormatPtr> NewFormat;
sigc::signal<void, FormatPtr> FormatEdited;
sigc::signal<void, FormatPtr> FormatRemoved;
sigc::signal<FormatPtr, FormatPtr> NewFormat;