code: private void appendListOfValues(ClassDescriptor cld, StringBuffer stmt)
      {
          FieldDescriptor[] fields = cld.getAllRwFields();
  
          if(fields.length == 0)
          {
              return;
          }
  
          stmt.append(" VALUES (");
          for(int i = 0; i < fields.length; i++)
          {
              stmt.append("?");
              if(i < fields.length - 1)
              {
                  stmt.append(",");
              }
          }
          stmt.append(") ");
      }
docs: generates a values(?,) for a prepared insert statement.
  returns null if there are no fields
  @param stmt the StringBuffer