regex101: Arrow function to Normal function

Regular Expression

(\([\w\s].*[\w\s]\)|\(\)) =>

New

var MODULE = ((my, $, undefined) => {

    console.log('EXECUTION FROM LEGACY APP START ===>');

    // if private var defined in my module, use that
    // else create a private var
    var _private = my._private = my._private || {},
        _seal = my._seal = function seal(seal) {
            if (!seal) {
                return;
            }

            delete my._private;
            delete my._seal;
            console.log('SEALED');
        },
        _unseal = my._unseal = function unseal(unseal) {
            if (!unseal) {
                return;
            }

            my._seal = _seal;
            my._private = _private;
            console.log('UNSEALED');
        };

    var name = 'Tonny Frank';
    _private.name = 'This is a private name: ' + name;

    _private.reverse = function reverse(str) {
        return str.split('').reverse().join('');
    };

    if ($ === undefined) {
        console.log('jQuery not defined');
        return;
    }

    $(() => {
        var $h1 = $('.card').children('h1');
        $h1.html(_private.reverse($h1.html()));
    });

    console.log(my);
    my.myMethod = () => {
        console.log('MODULE myMethod Executed');
        $('.name').html('Abhisek ...');
        $('button').click(function (ev) {
            ev.preventDefault();
            console.log(this);
            $(this).html('Damn!');
        });
    };

    console.log('EXECUTION FROM LEGACY APP END <===');

    return my;
})(MODULE || {}, this.jQuery);

Extraction

var MODULE = ((my, $, undefined) => {

    console.log('EXECUTION FROM LEGACY APP START ===>');

    // if private var defined in my module, use that
    // else create a private var
    var _private = my._private = my._private || {},
        _seal = my._seal = function seal(seal) {
            if (!seal) {
                return;
            }

            delete my._private;
            delete my._seal;
            console.log('SEALED');
        },
        _unseal = my._unseal = function unseal(unseal) {
            if (!unseal) {
                return;
            }

            my._seal = _seal;
            my._private = _private;
            console.log('UNSEALED');
        };

    var name = 'Tonny Frank';
    _private.name = 'This is a private name: ' + name;

    _private.reverse = function reverse(str) {
        return str.split('').reverse().join('');
    };

    if ($ === undefined) {
        console.log('jQuery not defined');
        return;
    }

    $(() => {
        var $h1 = $('.card').children('h1');
        $h1.html(_private.reverse($h1.html()));
    });

    console.log(my);
    my.myMethod = () => {
        console.log('MODULE myMethod Executed');
        $('.name').html('Abhisek ...');
        $('button').click(function (ev) {
            ev.preventDefault();
            console.log(this);
            $(this).html('Damn!');
        });
    };

    console.log('EXECUTION FROM LEGACY APP END <===');

    return my;
})(MODULE || {}, this.jQuery);