import type { ReactNode } from "react";
export type ToolbarSlotProps = {
    children: ReactNode;
    /** A disabled member never registers, so the arrows skip it. */
    isDisabled?: boolean;
    itemKey: string;
    /** `RovingFocus.register` — membership of the arrow-key group. */
    register: (value: string) => () => void;
    tabIndex: number;
    /** Hands the slot's box to the measuring hook. */
    trackElement: (key: string, element: HTMLElement | null) => void;
    /** Hands the slot's focusable to the toolbar, for `.focus()`. */
    trackFocusable: (key: string, element: HTMLElement | null) => void;
};
/**
 * One member of the toolbar's roving group: an action the toolbar
 * rendered, or a control the caller handed in.
 *
 * Its own file because **registration is an effect**, and an effect
 * cannot run in a loop — the same reason `MenuAction`, `TabTrigger`
 * and `AccordionSection` are separate files.
 *
 * ### Why the tab stop is written imperatively
 *
 * Every other roving group in this library passes `tabIndex` as a
 * prop, because it renders its own members. A toolbar does not: a
 * `control` item is whatever the app already has — a `Switch`, a
 * `ColorSchemeSwitcher`, a `SegmentedControl` — and most components
 * in this library do not forward a `tabIndex` prop at all. Cloning
 * one onto them would compile, do nothing, and leave the bar with
 * one tab stop per control, which is precisely the APG violation
 * this component exists to fix (mux-magic's `role="toolbar"` is six
 * sequential tab stops).
 *
 * So the slot finds the one focusable in its subtree and writes
 * `tabIndex` onto it. React never sets that attribute on these
 * elements, so there is no second writer to fight with.
 *
 * A control holding **more than one** focusable is a nested
 * composite the toolbar does not manage; only the first is given
 * the tab stop, and `Toolbar.mdx` says so.
 */
export declare const ToolbarSlot: ({ children, isDisabled, itemKey, register, tabIndex, trackElement, trackFocusable, }: ToolbarSlotProps) => ReactNode;
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