SchemaElementsViewRoot root = ( SchemaElementsViewRoot ) viewer.getInput();
Object element = e.getNewValue();
if ( element instanceof AttributeType )
{
root.addChild( new AttributeTypeWrapper( ( AttributeType ) element, root ) );
}
else if ( element instanceof ObjectClass )
{
root.addChild( new ObjectClassWrapper( ( ObjectClass ) element, root ) );
}