import { HttpClient } from "@angular/common/http";
export declare class ApiService {
    protected httpClient: HttpClient;
    localCache: {
        [key: string]: any[];
    };
    inFlight: {
        [key: string]: Promise<any[]>;
    };
    constructor(httpClient: HttpClient);
    get(url: string): Promise<any[]>;
    getData(self: ApiService, url: string): Promise<any[]>;
    notConcurrent(url: any, proc: (self: ApiService, url: string) => PromiseLike<any[]>): () => Promise<any[]>;
}