'use strict'; module.exports = function split(numberOfGroups) { const itemsPerGroup = Math.round(this.items.length / numberOfGroups); const items = JSON.parse(JSON.stringify(this.items)); const collection = []; for (let iterator = 0; iterator < numberOfGroups; iterator += 1) { collection.push(new this.constructor(items.splice(0, itemsPerGroup))); } return new this.constructor(collection); };