code: function isKey$1(value, object) {
    if (isArray$5(value)) {
      return false;
    }
    var type = typeof value;
    if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) {
      return true;
    }
    return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || object != null && value in Object(object);
  }
docs: Checks if `value` is a property name and not a property path.
  
  @private
  @param {*} value The value to check.
  @param {Object} [object] The object to query keys on.
  @returns {boolean} Returns `true` if `value` is a property name, else `false`.