return self;
JExpression newLeft = (JExpression)left.accept(this); JExpression newRight = (JExpression)right.accept(this); return new JShiftExpression(null, oper, newLeft, newRight);
    public Object visitShiftExpression(JShiftExpression self,                                     int oper,                                     JExpression left,                                     JExpression right)    {        blockStart("ShiftExpression");	return self;    }