class Test {
    otherFunction() {}
    method() {
        this.otherFunction();
    }
}

Above typescript will generate ES5 js like this

var Test = /** @class */ (function () {
    function Test() {
    }
    Test.prototype.otherFunction = function () { };
    Test.prototype.method = function () {
        this.otherFunction();
    };
    return Test;
}());

How to get output like below function after compiling typescript?

var Test = (function() {
    function Test() {}

    function otherFunction() {}

    Test.prototype.method = function () {
        otherFunction();
    }

    return Test;

})();