import type { Datum } from "../charts/shared/datumTypes";
export type CategoryDomainAccessor<T = Datum> = string | ((d: T) => unknown);
export declare function extractCategoryDomain<T extends Datum>(data: T[], accessor: CategoryDomainAccessor<T> | undefined): string[];
export declare function sameCategoryDomain(a: readonly string[], b: readonly string[]): boolean;
