@Override
    public int compareTo(ModifyableColumnFamilyDescriptor other) {
      return COMPARATOR.compare(this, other);
    }
Set the setPrefetchBlocksOnOpen flag
@param value true if we should prefetch blocks into the blockcache on open
@return this (for chained invocation)
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java