import { SelectListV2GroupType, SelectListV2Row } from './selectListV2.types';
/**
 * Option count past which virtualization is enabled by default. Each row
 * mounts a ResizeObserver for truncation detection, so larger lists should
 * use the existing VirtualList path unless the consumer explicitly opts out.
 */
export declare const SELECT_LIST_V2_VIRTUALIZE_HINT = 20;
/** Dev-only, once per distinct message, so a long list cannot flood the console. */
export declare const warnOnce: (key: string, message: string) => void;
/** Test seam: lets a suite assert the first warning of a run. */
export declare const resetSelectListV2Warnings: () => void;
/**
 * Flattens groups into render-ready rows.
 *
 * `subMenu` is rejected rather than flattened. Both V2 item models carry it,
 * but every renderer implements it as a Radix popover, and a list surface has
 * nowhere to anchor one. Silently dropping the children would lose options
 * with no signal, and indenting them inline would ship a drill-down UI that
 * was explicitly deferred — so the parent renders as an ordinary selectable
 * row and development gets a hard, unmissable error naming the item.
 */
export declare const flattenSelectListV2Groups: (groups: SelectListV2GroupType[]) => SelectListV2Row[];
/** Total renderable options, for `aria-setsize`. */
export declare const countSelectListV2Options: (rows: SelectListV2Row[]) => number;
/**
 * Values a select-all gesture may touch: exactly the options this surface
 * renders.
 *
 * `MultiSelectV2`'s `getAllAvailableValues` recurses into `subMenu`, which is
 * correct for the dropdown because it renders nested items in a popover. This
 * surface drops `subMenu` children, so reusing that helper would let Select All
 * push values for rows the user never saw into `onSelectionChange` — invisible
 * selections they cannot untick, an inflated `maxSelections` count, and a
 * select-all checkbox stuck short of "all".
 */
export declare const getSelectListV2AvailableValues: (groups: SelectListV2GroupType[]) => string[];
export type SelectListV2FocusTarget = {
    itemIndex: number;
    /** Index into the flattened rows, used to scroll a virtualized row in. */
    rowIndex: number;
    /** Stable item identity, used to cancel stale virtual focus handoffs. */
    value: string;
    disabled: boolean;
};
export declare const getSelectListV2FocusTargets: (rows: SelectListV2Row[], isRowDisabled: (row: Extract<SelectListV2Row, {
    kind: "item";
}>) => boolean) => SelectListV2FocusTarget[];