@Override
    public boolean isMobEnabled() {
      return getStringOrDefault(IS_MOB_BYTES, Boolean::valueOf, DEFAULT_MOB);
    }
Sets the mob threshold of the family.
@param threshold The mob threshold.
@return this (for chained invocation)
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java