private boolean first = true;
public HeadCommand() {
super("Print the head of a list of files, or stdin");
Files = new FileArgument("files", Argument.MULTIPLE | Argument.OPTIONAL, help_files);
Lines = new StringArgument("lines", Argument.OPTIONAL | Argument.EXISTING, help_lines);
Bytes = new StringArgument("bytes", Argument.OPTIONAL | Argument.EXISTING, help_bytes);
Quiet = new FlagArgument("quiet", Argument.OPTIONAL, help_quiet);
Verbose = new FlagArgument("verbose", Argument.OPTIONAL, help_verbose);
registerArguments(Files, Lines, Bytes, Quiet, Verbose);
}