code: function baseKeysIn(object) {
  	  if (!isObject$5(object)) {
  	    return nativeKeysIn(object);
  	  }
  	  var isProto = isPrototype(object),
  	      result = [];
  
  	  for (var key in object) {
  	    if (!(key == 'constructor' && (isProto || !hasOwnProperty$6.call(object, key)))) {
  	      result.push(key);
  	    }
  	  }
  	  return result;
  	}
docs: The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  
  @private
  @param {Object} object The object to query.
  @returns {Array} Returns the array of property names.