@Override
 public Void visit(BooleanValue booleanValue) {
   this._setBooleanValue(booleanValue.getValue());
   return null;
 }
 @Override
 public BooleanLiteral visitBooleanLiteral(@NotNull QLParser.BooleanLiteralContext ctx) {
   BooleanValue booleanValue = (BooleanValue) ctx.booleanLiteralP().accept(this);
   return new BooleanLiteral(booleanValue.getValue());
 }