/**
 * Returns true if the passed value is empty, by some measure of its type.
 * - objects (true if no properties, fuzzy mode true if no non-undefined properties)
 * - arrays, maps & sets (true if no values, fuzzy mode true if no non-undefined values)
 * - strings (true if “”)
 * - numbers (true if NaN, fuzzy mode true if 0)
 * - booleans (always false, fuzzy mode true if false)
 * - dates (always false, fuzzy mode true if invalid)
 * - undefined (always true)
 * - null (always false in strict mode, always true in fuzzy mode)
 *
 * @param {Collection} collection Value to test for emptiness
 * @param {boolean} [fuzzy] Fuzzy mode
 * @returns {boolean}
 */
export default function empty(collection: Collection, fuzzy?: boolean): boolean;