code: public static void clear(long[] bits, int pos) {
      int offset = pos >> LONG_SHIFT;
      if (offset >= bits.length)
        throw new IndexOutOfBoundsException();
      bits[offset] &= ~(1L << pos);
    }
docs: Set the bit for the given position to false.
  
  @param bits - bitset
  @param pos - position to be set to false