Adds the argument to the receiver's list at the given
zero-relative index.
<p>
Note: To add an item at the end of the list, use the
result of calling <code>getItemCount()</code> as the
index or use <code>add(String)</code>.
</p>
@param string the new item
@param index the index for the item
@exception IllegalArgumentException <ul>
<li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)</li>
</ul>
@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>
Adds the argument to the receiver's list at the given zero-relative index. <p> Note: To add an item at the end of the list, use the result of calling <code>getItemCount()</code> as the index or use <code>add(String)</code>. </p>
@param string the new item @param index the index for the item
@exception IllegalArgumentException <ul> <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)</li> </ul> @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>
@see #add(String)