Customizing TwinColSelect

i need to enhance TwinColSelect by adding a feature from ComboBox. which is highlighted in the attached image. please help me out

Hmm, I’ve never tried this, but possibly could be done by either extending VTwinColSelect and TwinColSelectConnector or creating an
for the component. You can check how ComboBox deals with the issue by checking out the use of field ‘status’ that is initialised on row 215
. And just in case you haven’t done much client-side coding before, remember to keep your client-side classes within a ‘client’ package inside the package where you have your .gwt.xml file, and to rebuild your widgetset after every change.