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  1. @interface GridChange : Change
  2. {
  3.     id        graphicView;
  4.     int     oldSpacing;
  5.     float     oldGray;
  6.     BOOL    oldVisible;
  7.     BOOL    oldEnabled;
  8.     int     newSpacing;
  9.     float     newGray;
  10.     BOOL    newVisible;
  11.     BOOL    newEnabled;
  12. }
  13.  
  14. - initGraphicView:aGraphicView;
  15. - (const char *)changeName;
  16. - saveBeforeChange;
  17. - undoChange;
  18. - redoChange;
  19. - (BOOL)subsumeChange:change;
  20.  
  21. @end
  22.