/**
 * Reduces an object's key value (Date or string representation of a date) to a sortable string
 *
 * @since v0.0.1
 * @category Sorting
 * @param {string} key - The key in the object
 * @param {'h' | 'm' | 's'} [depth] - Compare depth of time, h/m/s
 * @returns {<T = Record<string, unknown>>(obj: T) => string}
 * @example
 * sortReduceDate('stamp')({ stamp: '03/20/2020' })
 * //=> '20200220'
 *
 * sortReduceDate('stamp')({ stamp: new Date(2020, 9, 7) })
 * //=> '20200907'
 *
 * sortReduceDate('stamp', 's')({ stamp: '2020-10-20T14:48:25.000' })
 * //=> '20200920144825'
 */
export declare const sortReduceDate: (key: string, depth?: 'h' | 'm' | 's') => <T = Record<string, unknown>>(obj: T) => string;