bugfix> angular > 投稿
   import { Injectable } from '@angular/core';
    import { Http,Headers } from '@angular/http';
     import { List } from '../models/List'
     import {Observable} from 'rxjs/Rx';
     import 'rxjs/add/operator/map';
     @Injectable()
export class ListService {
    constructor(private http: Http) { }
    private serverApi= 'http://localhost:3000';
    public getAllLists():Observable<List[]> {
        let URI = `${this.serverApi}/bucketlist/`;
        return this.http.get(URI)
            .map(res => res.json())
            .map(res => <List[]>res.lists);
    }
    public deleteList(listId : string) {
      let URI = `${this.serverApi}/bucketlist/${listId}`;
        let headers = new Headers;
        headers.append('Content-Type', 'application/json');
        return this.http.delete(URI, {headers})
        .map(res => res.json());
    }
}

エラーが発生しています プロパティマップはObservableタイプでは使用できません。誰でも助けてください