Bug 128298 ViewerSorter.compare() does not need to be overridden from superclass
The ViewerComparator class was added as a superclass of ViewerSorter (for ICU4J). ViewerSorter overrides compare() from ViewerComparator, but this is not necessary if in the superclass implementation getComparator().compare() is called, instead of comparator.compare().
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerSorter.java
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 * Contributors:
 *     IBM Corporation - initial API and implementation
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package org.eclipse.jface.viewers;
import java.text.Collator;
import java.util.Comparator;
/**