1  'use strict'
 2  
 3  const Range = require('../classes/range')
 4  const validRange = (range, options) => {
 5    try {
 6      // Return '*' instead of '' so that truthiness works.
 7      // This will throw if it's invalid anyway
 8      return new Range(range, options).range || '*'
 9    } catch (er) {
10      return null
11    }
12  }
13  module.exports = validRange