/**
 * DateRange class to store ranges and query dates.
 *
 * @constructor
 * @param {(Moment|Date)} start Start of interval
 * @param {(Moment|Date)} end End of interval
 *//**
 * DateRange class to store ranges and query dates.
 *
 * @constructor
 * @param {!Array} range Array containing start and end dates.
 *//**
 * DateRange class to store ranges and query dates.
 *
 * @constructor
 * @param {!String} range String formatted as an IS0 8601 time interval
 */
function DateRange(start, end) {
  // ...
}