import { HttpBaseRequest } from "./HttpBaseRequest";
import { HttpBaseResponse } from "./HttpBaseResponse";
export declare class HttpClient {
    private static httpClient;
    private axiosInstance;
    private constructor();
    static getInstance(): HttpClient;
    execute<T>(baseRequest: HttpBaseRequest, responseType?: new (...args: any[]) => T): Promise<HttpBaseResponse<T>>;
    private handleErrorResponse;
    private handleCustomErrorMessage;
    private handlePDFServicesAPIErrorResponse;
    private handleCloudAPIErrorResponse;
    private createHTTPBaseResponse;
    private transformAxiosHeaders;
    private createAxiosRequestConfig;
}