private void clearBit(int bitIndex) {
    int unitIndex = unitIndex(bitIndex);
    long bit = bit(bitIndex);
    units[unitIndex] &= ~bit;
  }
Sets the bit specified by the index to <code>false</code>.

@param bitIndex the index of the bit to be cleared.
geode-core/src/main/java/org/apache/geode/internal/UniqueIdGenerator.java