Returns <code>true</code> if the item is selected,
and <code>false</code> otherwise. Indices out of
range are ignored.
@param index the index of the item
@return the selection state of the item at the index
@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>
Returns <code>true</code> if the item is selected, and <code>false</code> otherwise. Indices out of range are ignored.
@param index the index of the item @return the selection state of the item at the index
@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>