import { RefObject, KeyboardEvent } from 'react';
export declare function makeOptionId(listboxId: string, value: string, isCreatable: boolean): string;
export interface KeyHandlerCtx {
    open: boolean;
    disabled?: boolean;
    optionsLen: number;
    highlightedIndex: number;
    setOpen: (v: boolean) => void;
    setSearch: (v: string) => void;
    setHighlightedIndex: (updater: (prev: number) => number) => void;
    selectAt: (index: number) => void;
    buttonRef: RefObject<HTMLButtonElement | null>;
}
export declare function handleComboboxKeyDown(e: KeyboardEvent<HTMLButtonElement>, ctx: KeyHandlerCtx): void;
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