optimize build for rxjs operators

[Alexander Mills]

I had this:

import {of, throwError} from 'rxjs'

import {switchMap, map} from 'rxjs/operators'

but the namespace was getting polluted, so I did this:

import * as op from "rxjs/operators";
import * as rx from "rxjs";

using using * for imports going to prevent build optimization for angular/webpack or?