@Override
    public Map<String, String> getConfiguration() {
      // shallow pointer copy
      return Collections.unmodifiableMap(configuration);
    }
Parse the serialized representation of a {@link ModifyableColumnFamilyDescriptor}
@param bytes A pb serialized {@link ModifyableColumnFamilyDescriptor} instance with pb magic
             prefix
@return An instance of {@link ModifyableColumnFamilyDescriptor} made from <code>bytes</code>
@see #toByteArray()
hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java