Bug 46351 Call Hierarchy must not implement IViewSite [call hierarchy]
I20031105 The call hierarchy component implements IViewSite which is not allowed. There seems to be no reason for doing so: the CallHierarchyViewPart should directly set the selection provider to its site.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyLabelDecorator.java
/**
     * Creates a decorator. The decorator creates an own image registry to cache
     * images. 
     */
    public CallHierarchyLabelDecorator() {
    }   
    /* (non-Javadoc)
     * @see ILabelDecorator#decorateText(String, Object)
     */
    public String decorateText(String text, Object element) {
        return text;
    }   
    /* (non-Javadoc)