DistroHard/node_modules/underscore/amd/flatten.js

define(['./_flatten'], function (_flatten) {

  // Flatten out an array, either recursively (by default), or up to `depth`.
  // Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively.
  function flatten(array, depth) {
    return _flatten(array, depth, false);
  }

  return flatten;

});