@@ -75,14 +75,22 @@
  * @param component The path component to append
  * @return A new, autoreleased OFString with the path component appended
  */
 - (OFString *)stringByAppendingPathComponent: (OFString *)component;
 
+/**
+ * @brief Creates a new string by appending a path extension.
+ *
+ * @param extension The extension to append
+ * @return A new, autoreleased OFString with the path extension appended
+ */
+- (OFString *)stringByAppendingPathExtension: (OFString *)extension;
+
 - (bool)of_isDirectoryPath;
 - (OFString *)of_pathToURLPathWithURLEncodedHost:
     (OFString *__autoreleasing _Nullable *_Nonnull)URLEncodedHost;
 - (OFString *)of_URLPathToPathWithURLEncodedHost:
     (nullable OFString *)URLEncodedHost;
 - (OFString *)of_pathComponentToURLPathComponent;
 @end
 
 OF_ASSUME_NONNULL_END