Bug 111414 Open Type dialog: 'Fully Qualify Duplicates' does not work as expected
I20050928-1300 The menu 'Fully Qualify Duplicates' in the Open Type dialog does not affect the qualification (which is always on for duplicates) but actually appends the container info.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/dialogs/TypeSelectionDialog2.java
public boolean needsExecution() {
				TypeInfoHistory history= TypeInfoHistory.getInstance();
				return fgFirstTime || history.isEmpty() || history.needConsistencyCheck(); 
			}
			private void refreshSearchIndices(IProgressMonitor monitor) throws InvocationTargetException {
				try {
					new SearchEngine().searchAllTypeNames(
						null, 
						  
						"_______________".toCharArray(), 
						SearchPattern.R_EXACT_MATCH | SearchPattern.R_CASE_SENSITIVE, 
						IJavaSearchConstants.ENUM,
						SearchEngine.createWorkspaceScope(), 
						new TypeNameRequestor() {}, 
						IJavaSearchConstants.WAIT_UNTIL_READY_TO_SEARCH, 
						monitor);
				} catch (JavaModelException e) {
					throw new InvocationTargetException(e);
				}
			}
		}
		ConsistencyRunnable runnable= new ConsistencyRunnable();
		if (!runnable.needsExecution())
			return;
		IRunnableContext context= fRunnableContext != null 
			? fRunnableContext 
			: PlatformUI.getWorkbench().getProgressService();
		context.run(true, true, runnable);
	}
}