Can I disable the close button for some tabs?

Suite and Optimus Suite 5
#1

When I create a tab, how can I create a tab with no close button. Yet create other tabs with the close button. As opposed to all or nothing close buttons?

#2

tabbar.enableTabCloseButton(true);
tabbar.addTab(“a1”,“Tab 1”,“100px”);
…
tabbar.enableTabCloseButton(false);
tabbar.addTab(“aN”,“Tab N”,“100px”);