export interface ItemNode {
    item: any;
    key: any;
    from: number | null;
    to: number | null;
    index: number;
    link: ItemNode | null;
}
export interface Container {
    append(node: ItemNode): void;
    remove(node: ItemNode): void;
    insertBefore(newNode: ItemNode, nextNode: ItemNode): void;
    checkIdentity(lastNode: ItemNode, newNode: ItemNode): void;
}
export interface Operation {
    node: ItemNode;
    previousIndex: number | null;
    currentIndex: number | null;
}