code: @Deprecated
      protected static ValidationBuilder convertDate(String attributeName, String format){
          return ModelDelegate.convertDate(modelClass(), attributeName, format);
      }
docs: Converts a named attribute to <code>java.sql.Date</code> if possible.
  Acts as a validator if cannot make a conversion.
  
  @param attributeName name of attribute to convert to <code>java.sql.Date</code>.
  @param format format for conversion. Refer to {@link java.text.SimpleDateFormat}
  @return message passing for custom validation message.
  @deprecated use {@link #dateFormat(String, String...) instead