/**
 * Converts a Date or number to a number. If a string is passed, it will be converted to a number if it is a string of digits, otherwise it will be converted to a Date (expects a date ISO string) and then a number.
 * @param dateOrNumber
 * @param fallBack The value to return if the value is undefined or null. Defaults to `0`.
 * @returns
 */
export declare function dateOrNumberToNumber(dateOrNumber: Date | number | string | undefined | null, fallBack?: number): number;