Get SearchBar value reactively


I used to have this code in Ionic2-beta10

      <ion-searchbar [ngFormControl]="searchControl"

and I could write something like:

      (c, t) => ({ c, t }))
      .subscribe(result => ... do something with both data and term.

I noticed that ngFormControl has been deprecated in Beta11. How can I do something similar with SearchBar without wrapping it to a form (in order to build a reactive form) etc…?