docs: private static ColumnInfo[] prependColumn(ColumnInfo firstColumn, ColumnInfo[] columns) {
          int allLen = 1 + columns.length;
          ColumnInfo[] allColumns = new ColumnInfo[allLen];
          allColumns[0] = firstColumn;
          for (int i = 0; i < columns.length; i++) {
              allColumns[i+1] = columns[i];
          }
          return allColumns;
      }