import { Observable } from "rxjs/Observable";
import { concat } from "rxjs/observable/concat";
import { filter } from "rxjs/operator/filter";

const source = concat(Observable.of(1), Observable.from([2, 3]));
                                 ~~                                             [no-patched % ("of")]
                                                   ~~~~                         [no-patched % ("from")]
const filtered = source.filter((value) => value > 1) as Observable<number>;
                        ~~~~~~                                                  [no-patched % ("filter")]
const mapped = filtered.map((value) => value + 1);

[no-patched]: RxJS patched methods are forbidden: %s