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Return the category and order within the category of this item. This item will be shown before all items (within its category) that have order greater than this value.
An order integer contains the item's category (the upper bits of the integer; set by or/add the category with the order within the category) and the ordering of the item within that category (the lower bits). Example categories are Menu.CATEGORY_SYSTEM, Menu.CATEGORY_SECONDARY, Menu.CATEGORY_ALTERNATIVE, Menu.CATEGORY_CONTAINER. See Android.Views.Menu for a full list.