public static NFSFileVec make(File f) {
    Futures fs = new Futures();
    NFSFileVec nfs = make(f, fs);
    fs.blockForPending();
    return nfs;
  }
public static NFSFileVec make ( File f ) { Futures fs = new Futures ( ) ; NFSFileVec nfs = make ( f , fs ) ; fs . blockForPending ( ) ; return nfs ; }
Make a new NFSFileVec key which holds the filename implicitly.  This name
is used by the Chunks to load data on-demand.  Blocking
@return  A NFSFileVec mapped to this file.