import { SideNavigationProps } from './interfaces';
type ExpandableItem = SideNavigationProps.Section | SideNavigationProps.ExpandableLinkGroup;
export declare function hasActiveLink(items: ReadonlyArray<SideNavigationProps.Item>, activeHref: string): boolean;
export declare function hasNavigationIcons(items: ReadonlyArray<SideNavigationProps.Item>): boolean;
export declare function generateExpandableItemsMapping(items: ReadonlyArray<SideNavigationProps.Item>, mapping?: WeakMap<SideNavigationProps.Item, ReadonlyArray<ExpandableItem>>, expandableParents?: ReadonlyArray<ExpandableItem>): WeakMap<SideNavigationProps.Item, ReadonlyArray<ExpandableItem>>;
export declare function checkDuplicateHrefs(items: ReadonlyArray<SideNavigationProps.Item>): void;
/**
 * Warns when a collapsed-rail link (root-level link, link-group, ELG, or
 * promoted root-section child) would render without an icon, making it
 * invisible in the collapsed state.
 *
 * Plain links without icons are hidden entirely. Link-groups and ELGs without
 * icons render with no visual indicator. Root-level sections/section-groups
 * promote their direct children, so icon-less children there are also hidden.
 */
export declare function checkCollapsedIconSupport(items: ReadonlyArray<SideNavigationProps.Item>, collapsed: boolean): void;
export {};