docs: public void init(BaseField field, GridScreenParent gridScreen, Record recGrid, boolean bCreateSortOrder)
      {
          m_recGrid = recGrid;
          m_bCreateSortOrder = bCreateSortOrder;
          super.init(field, gridScreen, null);
          m_iKeyAreaArray = new String[MAX_ARRAY_SIZE];
          for (int i = 0; i < MAX_ARRAY_SIZE; i++)
              m_iKeyAreaArray[i] = null;
          m_iNextArrayIndex = 0;
      }