@Override
  public void initialize(URI path, Configuration config) throws IOException {
    initialize(path, config, /* initSuperclass= */ true);
  }
@ Override public void initialize ( URI path , Configuration config ) throws IOException { initialize ( path , config , true ) ; }
See {@link #initialize(URI, Configuration, boolean)} for details; calls with third arg
defaulting to 'true' for initializing the superclass.

@param path URI of a file/directory within this file system.
@param config Hadoop configuration.