private void RemoveChoice(SymbolV symbolV)
{
ConcatenationD concatD = symbolV.getReference().Parent as ConcatenationD;
if (concatD == null)
throw new Exception("The symbol does not have a parent of type concatenationD");
model.Functions.Delete(concatD);
view.Functions.Delete(concatD);
ReDraw();
}
public void AddChoice(SymbolV symbolV)
{
GrammarNodeVAddChoiceVisitor visitor = new GrammarNodeVAddChoiceVisitor(symbolV.getReference());
startSymbol.accept(visitor);
}