/**
 * An action which occurred when a {@link ObservableArray} was updated
 */
export declare enum EObservableArrayChangedAction {
    /**
     * One or more items was added. Check the {@link ObservableArrayChangedArgs.newItems} property for which items
     */
    Add = 0,
    /**
     * One or more items were removed. Check the {@link ObservableArrayChangedArgs.oldItems} property for which items
     */
    Remove = 1,
    /**
     * One or more items were replaced. Check the {@link ObservableArrayChangedArgs.newItems} and
     * {@link ObservableArrayChangedArgs.oldItems} properties for which items
     */
    Replace = 2,
    /**
     * Treat this as a new collection (collection drastically changed). Consider all old items removed and all items as new
     */
    Reset = 3
}
/**
 * Event args used by the {@link ObservableArray.collectionChanged} event
 */
export declare class ObservableArrayChangedArgs {
    private readonly action;
    private readonly newItems;
    private readonly oldItems;
    /**
     * Creates an instance of the {@link ObservableArrayChangedArgs}
     * @param action
     * @param newItems
     * @param oldItems
     */
    constructor(action: EObservableArrayChangedAction, newItems: any[], oldItems: any[]);
    /**
     * Gets the operation that occurred on the {@link ObservableArray}. See {@link EObservableArrayChangedAction} for a
     * list of values
     */
    getAction(): EObservableArrayChangedAction;
    /**
     * Gets new items added if the {@link EObservableArrayChangedAction} was Add or Replace
     */
    getNewItems(): any[];
    /**
     * Gets old items removed if the {@link EObservableArrayChangedAction} was Remove or Replace
     */
    getOldItems(): any[];
}