eslint-config-airbnb-standard/node_modules/rxjs/src/internal/Operator.ts

Airbnb's JS ESLint config + JS Standard Style + semicolons

import { Subscriber } from './Subscriber';
import { TeardownLogic } from './types';

export interface Operator<T, R> {
  call(subscriber: Subscriber<R>, source: any): TeardownLogic;
}