docs: public static byte[] add(byte[] arr, int n) {
          int index = binarySearch(arr, n);
          byte[] arr2 = new byte[arr.length + 4];
          System.arraycopy(arr, 0, arr2, 0, index);
          System.arraycopy(arr, index, arr2, index + 4, arr.length - index);
          org.deephacks.confit.internal.hbase.Bytes.setInt(arr2, n, index);
          return arr2;
      }