code: function baseUpdate(object, path, updater, customizer) {
        return baseSet(object, path, updater(baseGet(object, path)), customizer);
      }
docs: The base implementation of `_.update`.
  
  @private
  @param {Object} object The object to modify.
  @param {Array|string} path The path of the property to update.
  @param {Function} updater The function to produce the updated value.
  @param {Function} [customizer] The function to customize path creation.
  @returns {Object} Returns `object`.