Returns <code>true</code> if the underlying window system prints out
warning messages on the console, and <code>setWarnings</code>
had previously been called with <code>true</code>.
@return <code>true</code>if warnings are being handled, and <code>false</code> otherwise
@exception SWTException <ul>
<li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li>
</ul>
Returns <code>true</code> if the underlying window system prints out warning messages on the console, and <code>setWarnings</code> had previously been called with <code>true</code>.
@return <code>true</code>if warnings are being handled, and <code>false</code> otherwise
@exception SWTException <ul> <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> </ul>