public static boolean addLocationsOrderInterceptor(Configuration conf) throws IOException {
    return addLocationsOrderInterceptor(conf, new ReorderWALBlocks());
  }
Returns an instance of Filesystem wrapped into the class specified in hbase.fs.wrapper
property, if one is set in the configuration, returns unmodified FS instance passed in as an
argument otherwise.
@param base Filesystem instance to wrap
@param conf Configuration
@return wrapped instance of FS, or the same instance if no wrapping configured.
hbase-server/src/main/java/org/apache/hadoop/hbase/fs/HFileSystem.java