@reactivex/rxjs/compat/add/operator/sampleTime.ts

Reactive Extensions for modern JavaScript

import { Observable } from 'rxjs';
import { sampleTime } from '../../operator/sampleTime';

(Observable as any).prototype.sampleTime = sampleTime;

declare module 'rxjs/internal/Observable' {
  interface Observable<T> {
    sampleTime: typeof sampleTime;
  }
}