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var arrayAggregator = require('./_arrayAggregator'),    baseAggregator = require('./_baseAggregator'),    baseIteratee = require('./_baseIteratee'),    isArray = require('./isArray');
/** * Creates a function like `_.groupBy`. * * @private * @param {Function} setter The function to set accumulator values. * @param {Function} [initializer] The accumulator object initializer. * @returns {Function} Returns the new aggregator function. */function createAggregator(setter, initializer) {  return function(collection, iteratee) {    var func = isArray(collection) ? arrayAggregator : baseAggregator,        accumulator = initializer ? initializer() : {};
    return func(collection, setter, baseIteratee(iteratee, 2), accumulator);  };}
module.exports = createAggregator;