public ModifyableColumnFamilyDescriptor setBlocksize(int s) {
      return setValue(BLOCKSIZE_BYTES, Integer.toString(s));
    }
Set minimum and maximum versions to keep.
@param minVersions minimal number of versions
@param maxVersions maximum number of versions
@return this (for chained invocation)
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java