static UnixStream<String> cat(final String filePath) throws IOException {
  Objects.requireNonNull(filePath,"The file path must not be null");
  return new UnixStreamImpl<>(lines(Paths.get(filePath)));
}

static UnixStream < String > cat ( final String filePath ) throws IOException { Objects . requireNonNull ( filePath , "The file path must not be null" ) ; return new UnixStreamImpl < > ( lines ( Paths . get ( filePath ) ) ) ; }
create a new unixstream of lines of the given file .
