Bug 5128 JavaUI.revealInEditor doesn't handle ICompilationUnits properly
When calling JavaUI.revealInEditor with an ICompilationUnit, then the package declaration is revealed. This isn't useful, passing an ICompilationUnit should be treated as a no-op. Otherwise clients need to guard against revealing the package declaration in their code (see OpenResourceAction as an example)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
protected JavaOutlinePage fOutlinePage;
	
	
	protected String fOutlinerContextMenuId;	
	
	/**
	 * Returns the smallest ISourceReference also implementing IJavaElement
	 * containing the given position.
	 */
	abstract protected ISourceReference getJavaSourceReferenceAt(int position);