How to make tasks run sequentially on Elixir in Laravel?

Question

gulp.js

There are three tasks, two of them can be executed asynchronously, but the third must be executed after two. How to do it using Elixir (a gimmick wrapper for Gulp that communicates with Larvel)
Using the construct:

elixir.extend('task1.2.3', function() {
  new Task('task1.2.3', function() {
    // ....
  })
  .watch('./');
});

You have to use this construct to call later:

elixir(function(mix) {
  mix.task1();
       //... и след таски 
});

Please tell me how to solve this problem?
I tried to create separate gallp tasks and attach them to the structure:

gulp.task('task1'....)
gulp.task('task2'....)
elixir.extend('task1.2.3', ['task1', 'task2'], function() {
  new Task(...)
});

Answer 1

The bug seems to be there.