export enum ItemFlag {
    NoItemFlags = 0,
    ItemIsSelectable = 1,
    ItemIsEditable = 2,
    ItemIsDragEnabled = 4,
    ItemIsDropEnabled = 8,
    ItemIsUserCheckable = 16,
    ItemIsEnabled = 32,
    ItemIsAutoTristate = 64,
    ItemIsTristate = 64,
    ItemNeverHasChildren = 128,
    ItemIsUserTristate = 256,
}