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define(['./_isPrototype', './_nativeKeys'], function(isPrototype, nativeKeys) {
  /** Used for built-in method references. */  var objectProto = Object.prototype;
  /** Used to check objects for own properties. */  var hasOwnProperty = objectProto.hasOwnProperty;
  /**   * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.   *   * @private   * @param {Object} object The object to query.   * @returns {Array} Returns the array of property names.   */  function baseKeys(object) {    if (!isPrototype(object)) {      return nativeKeys(object);    }    var result = [];    for (var key in Object(object)) {      if (hasOwnProperty.call(object, key) && key != 'constructor') {        result.push(key);      }    }    return result;  }
  return baseKeys;});