protected int compareFamilies(KeyValue left, int leftFamilyPosition, int leftFamilyLength,
    ByteBufferKeyValue right, int rightFamilyPosition, int rightFamilyLength) {
    return ByteBufferUtils.compareTo(left.getFamilyArray(), leftFamilyPosition, leftFamilyLength,
      right.getFamilyByteBuffer(), rightFamilyPosition, rightFamilyLength);
  }
This method will be overridden when we compare cells inner store to bypass family comparing.
hbase-common/src/main/java/org/apache/hadoop/hbase/CellComparatorImpl.java