src/java.desktop/share/classes/javax/swing/text/GapContent.java

*** 756,765 ****
--- 756,767 ----
       * <p>
       * This is meant for internal usage, and is generally not of interest
       * to subclasses.
       *
       * @param positions the UndoPosRef instances to reset
+      * @param offset where the string was inserted
+      * @param length length of inserted string
       */
      @SuppressWarnings("rawtypes") // UndoPosRef type cannot be exposed
      protected void updateUndoPositions(Vector positions, int offset,
                                         int length) {
          // Find the indexs of the end points.