Here is a complex dependency graphs built with no nesting and no "special" methods, only a combination of `then` and `all` function test(name1, name2) {

Here is a complex dependency graphs built with no nesting and no "special" methods, only a combination of `then` and `all` function test(name1, name2) { let user1 = User.find(name1) let user2 = User.find(name2) let post1 = user1.then(u => Posts.getLast(u.id)) let post2 = user2.then(u => Posts.getLast(u.id)) let comparison = Promise.all([post1, post2]) .then(([p1, p2]) => DiffService.compare(p1, p2)) let email1 = Promise.all([user1, comparison]) .then(([u1, c]) => Email.send(comparison.text(), u1.email)) let email2 = Promise.all([user2, comparison]) .then(([u2, c]) => Email.send(comparison.text() ,u2.email)) return Promise.all([email1, email2]) }