docs: Index getIndexForColumns(int[] cols) {
  
          int i = bestIndexForColumn[cols[0]];
  
          if (i > -1) {
              return indexList[i];
          }
  
          switch (tableType) {
  
              case TableBase.SYSTEM_SUBQUERY :
              case TableBase.SYSTEM_TABLE :
              case TableBase.VIEW_TABLE :
              case TableBase.TEMP_TABLE : {
                  Index index = createIndexForColumns(cols);
  
                  return index;
              }
          }
  
          return null;
      }