private String getRealIconRoot()
    {
        if (_iconRoot != null)
            return _iconRoot;
        if (_parent != null)
            return _parent.getRealIconRoot();
        return null;
    }
private String getRealIconRoot ( ) { if ( _iconRoot != null ) return _iconRoot ; if ( _parent != null ) return _parent . getRealIconRoot ( ) ; return null ; }
This method will walk the inheritable state looking for an icon root.
It returns null if not found.
@return the icon root or null.