public static final int ERROR = 1; // "generic" error

    @Override
    protected int execute(LookupContext context) throws Exception {
        // set up JLine built-in commands
        ConfigurationPath configPath = new ConfigurationPath(context.cwd.get(), context.cwd.get());
        Builtins builtins = new Builtins(context.cwd, configPath, null);
        builtins.rename(Builtins.Command.TTOP, "top");
        builtins.alias("zle", "widget");