Sets to <code>true</code> to indicate that the receiver's close button should be shown.
If the parent (CTabFolder) was created with SWT.CLOSE style, changing this value has
no effect.
@param close the new state of the close button
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
Sets to <code>true</code> to indicate that the receiver's close button should be shown. If the parent (CTabFolder) was created with SWT.CLOSE style, changing this value has no effect.
@param close the new state of the close button
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul>
@since 3.4