export declare const validateTopBarChildren: ({ hasBrandArea, hasPrimaryArea, hasSecondaryArea, }: {
    hasBrandArea: boolean;
    hasPrimaryArea: boolean;
    hasSecondaryArea: boolean;
}) => void;
/**
 * Checks whether a value is undefined, null, or an empty plain object.
 *
 * @param obj - The value to check.
 * @returns `true` if the value is undefined, null, or a non-array object with no own enumerable properties; otherwise, `false`.
 */
export declare const isEmptyObjectOrUndefined: (obj: unknown) => boolean;
export declare const BRAND_ADDON_VARIANT: readonly ["double", "single"];
export type BrandAddOnVariant = (typeof BRAND_ADDON_VARIANT)[number];