code: public Converter getFieldForScreen(int iIndex)
      {
          if (this.getFieldList() != null)
          {
              FieldInfo fieldInfo = this.getFieldList().getField(iIndex);
              if (fieldInfo != null)
              {
              	if (fieldInfo.isHidden())
              		return SKIP_THIS_FIELD;
                  return fieldInfo.getFieldConverter();
              }
          }
          return null;
      }
docs: Get this field (or return null if this field doesn't belong on the screen).
  This is the method to use to filter the items to display on the screen.
  @param The index of this field in the record.
  @return The fieldinfo object.