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modules/base/src/main/java/javafx/collections/transformation/TransformationList.java

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rev 9769 : 8139848: SortedList should provide a way to map source index to view index

@@ -146,6 +146,13 @@
             currentSource = tSource.source;
         }
         return idx;
     }
 
+    /**
+     * Maps the index of the direct source list's element to an index in this list.
+     * @param index the index in the source list
+     * @return the index of the element in this list
+     * @see #getSource(), #getSourceIndex()
+     */
+    public abstract int getViewIndex(int index);
 }
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