import type { OptionsType, OptionType, SectionOptionType } from './types';
export type OptionalToRequired<T> = {
    [P in keyof Required<T>]: Pick<T, P> extends Required<Pick<T, P>> ? T[P] : T[P] | undefined;
};
export declare const isFlatOptionsType: <T>(val: OptionsType<T>) => val is OptionType<T>[];
export declare const isSectionOptionsType: <T>(val: OptionsType<T>) => val is SectionOptionType<T>[];
export declare const isOptionType: <T>(val: OptionType<T> | OptionType<T>[]) => val is OptionType<T>;
export declare const isOptionIndexType: (val: number | number[]) => val is number;
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