export type FormatSizeTypes = number | string | null | undefined;
/**
 * Given a size, format it to a human readable string.
 *
 * @param size the size to format
 * @param emptyValue what to show when empty
 * @param scale the scale to format on
 * @param decimals number of decimal places
 * @returns formatted string
 */
export declare function formatSize(size: FormatSizeTypes, emptyValue?: string, scale?: string[], decimals?: number): string | string[];