import { Configuration } from "./configuration";
/**
 * The Singleton class defines the `getInstance` method that lets clients access
 * the unique singleton instance.
 */
export declare class ApiManager {
    private static instance;
    private _configuration;
    /**
     * The Singleton's constructor should always be private to prevent direct
     * construction calls with the `new` operator.
     */
    private constructor();
    /**
     * The static method that controls the access to the singleton instance.
     *
     * This implementation let you subclass the Singleton class while keeping
     * just one instance of each subclass around.
     */
    static getInstance(): ApiManager;
    /**
     *
     * @param configuration
     */
    setConfiguration(configuration: Configuration): void;
    /**
     *
     * @returns
     */
    getConfiguration(): Configuration;
}