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

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