(Idea) TwinColSelect captions

Just an idea.
TwinColSelect
widget could be more smart for those, who are not. Many people are looking at it and has no idea what is in the right column, even you say “Please select foobar” and that stuff comes to the right side.

TwinColSelect vegetablesField = new TwinColSelect("Available vegetables", "Selected vegetables");
vegetablesField.setLeftCaption("Available vegetables");
vegetablesField.setRightCaption("Selected vegetables");
vegetablesField.setRightCaption(null); // OK, not everyone needs two captions after all...

Good idea, and I believe it has already been suggested before and a ticket has been made:
#2942: Dual captions for TwinColSelect
.

Go vote for that ticket if it’s really important for you! Thanks!