import { Subject } from "rxjs/Subject";
import { Subscription } from "rxjs/Subscription";

const a = new Subject<number>();
const asub = a.subscribe();
asub.unsubscribe();

const b = new Subject<number>();
b.unsubscribe();
  ~~~~~~~~~~~                               [no-subject-unsubscribe]

const csub = new Subscription();
const c = new Subject<number>();
csub.add(c);
         ~                                  [no-subject-unsubscribe]

[no-subject-unsubscribe]: Calling unsubscribe on a subject is forbidden