code: function baseSet$1(object, path, value, customizer) {
    if (!isObject$6(object)) {
      return object;
    }
    path = castPath$2(path, object);
  
    var index = -1,
        length = path.length,
        lastIndex = length - 1,
        nested = object;
  
    while (nested != null && ++index < length) {
      var key = toKey$2(path[index]),
          newValue = value;
  
      if (index != lastIndex) {
        var objValue = nested[key];
        newValue = customizer ? customizer(objValue, key, nested) : undefined;
        if (newValue === undefined) {
          newValue = isObject$6(objValue) ? objValue : isIndex$2(path[index + 1]) ? [] : {};
        }
      }
      assignValue$3(nested, key, newValue);
      nested = nested[key];
    }
    return object;
  }
docs: The base implementation of `_.set`.
  
  @private
  @param {Object} object The object to modify.
  @param {Array|string} path The path of the property to set.
  @param {*} value The value to set.
  @param {Function} [customizer] The function to customize path creation.
  @returns {Object} Returns `object`.