export interface RequestTask {
    method: string;
    uri: string;
    data: any;
    callback: (error: any, data: any) => void;
}
export declare class RequestClient {
    private accessToken;
    private accountId;
    private concurrency;
    private queue;
    private timeout;
    private request;
    constructor(config: any);
    preprocess(body: any, response: {
        headers: any;
    }): {
        headers: any;
        data: any;
    };
    push(task: RequestTask): void;
    requestGenerator(): (task: RequestTask, done: Function) => void;
    retryAfter(task: RequestTask, retryAfter: number, done: Function): void;
}