This is in fact Lotus Expeditor, but I think the STabItem is not
specific to that, but is part of the RCP.
I need to prevent all Perspectivea from being closed by a user (all done
under program control). When I look at the properties for STabItem in
the debugger, there is a 'showClose' boolean, which I can set to false,
and I get what I want. But it doesn't seem to have a setter defined for
it. Is there a way to set this to 'false'?