/**
 * Description of the destination in the navigation menu.
 *
 * @param viewName Identifier of view.
 */
export interface ViewNavigationItem {
    viewName?: string;
    hidden?: boolean;
    /** TODO: remove in 2.0.0 */
    id?: string;
}
/**
 * Returns MenuItem if it is ViewNavigationItem
 *
 * @param item to be identified as view
 */
export declare function isViewNavigationItem(item: MenuItem): item is ViewNavigationItem;
/**
 * Description of the category in the navigation menu.
 * Used to create nesting levels of menu items.
 * @param categoryName The name of the category.
 * @param child list of categories or menu items included in a category.
 * TODO Deprecated. ViewNavigationCategory will be deleted in 2.0.0
 */
export interface ViewNavigationCategory {
    categoryName: string;
    child: Array<ViewNavigationCategory | ViewNavigationItem>;
}
/**
 * @param item
 * TODO Deprecated. ViewNavigationCategory will be deleted in 2.0.0
 */
export declare function isViewNavigationCategory(item: any): item is ViewNavigationCategory;
/**
 * Description of groups in the navigation menu.
 *
 * Used to create nesting levels of menu items.
 *
 * @param title Title of group. Navigation element shows it to user.
 * @param child Array of navigation elements specified below group(View or inner Group)
 */
export interface ViewNavigationGroup {
    /** TODO identifier will be nullable and string-only in 2.0.0 */
    id?: string | number;
    title: string;
    child: Array<ViewNavigationGroup | ViewNavigationItem>;
    hidden?: boolean;
    defaultView?: string;
}
/**
 * Returns MenuItem if it is ViewNavigationGroup
 *
 * @param item to be identified as group
 */
export declare function isViewNavigationGroup(item: MenuItem): item is ViewNavigationGroup;
/**
 * The type of object to describe the menu items in the navigation.
 */
export declare type MenuItem = ViewNavigationGroup | ViewNavigationCategory | ViewNavigationItem;
/**
 * 1 - for static, top level navigation
 * 2 - `SecondLevelMenu` tab widgets
 * 2 - `ThirdLevelMenu` tab widgets
 * 2 - `FourthLevelMenu` tab widgets
 */
export declare type NavigationLevel = 1 | 2 | 3 | 4;
/**
 * Model for displayed tab item
 */
export interface NavigationTab {
    /**
     * View name where navigation tab will redirect the user
     */
    viewName: string;
    /**
     * Displayed title: either view name or a group name
     */
    title?: string;
}