import { Observable } from 'rxjs'; export interface Month { month: string; delta: string; down: boolean; kWatts: string; cost: string; } export interface Electricity { title: string; active?: boolean; months: Month[]; } export interface ElectricityChart { label: string; value: number; } export abstract class ElectricityData { abstract getListData(): Observable; abstract getChartData(): Observable; }