lodash/_baseKeys.js

define([], function() {

  /* Built-in method references for those with the same name as other `lodash` methods. */
  var nativeKeys = Object.keys;

  /**
   * The base implementation of `_.keys` which doesn't skip the constructor
   * property of prototypes or treat sparse arrays as dense.
   *
   * @private
   * @type Function
   * @param {Object} object The object to query.
   * @returns {Array} Returns the array of property names.
   */
  function baseKeys(object) {
    return nativeKeys(Object(object));
  }

  return baseKeys;
});