import { DateAdapter, DateInput, DateTime } from './DateAdapter';
export declare class ArgumentError extends Error {}
export declare class InfiniteLoopError extends Error {}
export declare function numberSortComparer(a: number, b: number): 0 | 1 | -1;
export declare function freqToGranularity(
  freq: string,
): DateAdapter.TimeUnit | 'week';
export declare function cloneJSON<T>(json: T): T;
export declare function dateInputToDateAdapter(date: DateInput): DateAdapter;
export declare function dateInputToDateTime(
  date: DateInput,
  timezone: string | null,
): DateTime;
export declare function normalizeDateTimeTimezone(
  date: DateTime,
  timezone: string | null,
): DateTime;