How can I get done callback inside my task?

[beto-aveiga]

Hi! When using gulp-param I can't use done function to tell when my task with async functions ends.

gulp.task('default', function ( done ) {
    const drupal_settings = get_drupal_settings ();
    console.log(done);
});

For example, "done" is undefined. How can I use gulp-params and get the done function also?
Thanks.