/**
 * Attempts to cast candidate to a number.
 *
 * This method assumes you want an actual number and
 * not NaN.  In the case that candidate results in
 * NaN, then the fallback condition applies.
 *
 * @param candidate -
 *        The candidate to cast.
 *
 * @returns
 *        The casted number or undefined in the cast
 *        that casting candidate would result in NaN.
 */
export declare function castNumber(candidate: unknown): number | undefined;
/**
 * Attempts to cast candidate to a number.
 *
 * This method assumes you want an actual number and
 * not NaN.  In the case that candidate results in
 * NaN, then the fallback condition applies.
 *
 * @param candidate -
 *        The candidate to cast.
 * @param fallback -
 *        The fallback value in the case that the result
 *        of casting candidate would result in NaN
 *
 * @returns
 *        The casted number or fallback in the cast
 *        that casting candidate would result in NaN.
 */
export declare function castNumber(candidate: unknown, fallback: number): number;