Combine the current completion with a provided promise and return a new completion object that

• fulfills when both the current completion and the other promise are fulfilled, and
• rejects when either the current completion or the other promise is rejected.

The Completion's promise will be

• fulfilled with a tuple of values of the original promise (it is important to notice that tuple elements are in reverse order of the and chain), or
• rejected with the reason of the rejected promise.

The Completion object allows for promise chaining as a fluent API:

Promise<String> p1 = ...
Promise<Integer> p2 = ...
Promise<Boolean> p3 = ...
p1.and(p2, p3)
  .compose((Boolean b, Integer i, String s) 
            => doSomething(b, i, s));

When completion happens, the provided function will be invoked.

Compose and return a Promise

Compose and return a Promise with map functions