private void checkFamilies(Collection<byte[]> families, Durability durability)
    throws NoSuchColumnFamilyException, InvalidMutationDurabilityException {
    for (byte[] family : families) {
      checkFamily(family, durability);
    }
  }
@param delta If we are doing delta changes -- e.g. increment/append -- then this flag will be
             set; when set we will run operations that make sense in the increment/append
             scenario but that do not make sense otherwise.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java