RxJs 5：使用过滤器错误

Question

在filter管道处获取打字稿错误：

  this的

void上下文无法分配给方法的this类型   Observable<{}>

代码：

import { Observable } from 'rxjs/Observable';
import { Observer } from 'rxjs/Observer';
import { Injectable } from '@angular/core';
import { share } from "rxjs/operators/share";
import { filter } from 'rxjs/operator/filter';
import * as m from '../../models/app.models';

@Injectable()
export class SharedService {
    observable: Observable<any>;
    observer: Observer<any>;

    constructor() {
        var temp = Observable.create((observer: Observer<any>) => {
            this.observer = observer;
        });
        this.observable = temp.share();
    }

    broadcast(event: m.SharedEventModel) {
        this.observer.next(event);
    }

    on(eventName, callback) {
        return this.observable.pipe(filter(x => x.Name === eventName)).subscribe(callback); <-- Error
    }
}

RxJs版本：5.5.2