残念ながらShiftの判定が死んでるので削除

Author: miyabi033

src/main/java/dev/felnull/bettergui/listener/GUIClickListener.java

@@ -79,18 +79,6 @@ public void onClick(InventoryClickEvent e){
                     page.onOutsideWindowLeftClick(e);
                 }
                 break;
-            case SHIFT_RIGHT:
-                if(e.getSlot() == -999){
-                    page.onOutsideWindowShiftClick(e);
-                    page.onOutsideWindowRightShiftClick(e);
-                }
-                break;
-            case SHIFT_LEFT:
-                if(e.getSlot() == -999){
-                    page.onOutsideWindowShiftClick(e);
-                    page.onOutsideWindowLeftShiftClick(e);
-                }
-                break;
         }
 
         e.setCancelled(true);