import { SignalService } from './SignalService';
/**
 * Represents the global scope service.
 */
declare global {
    interface Window {
        __composaic_singletonInstances__?: Map<string, unknown>;
    }
}
/**
 * Represents the mapping of service types.
 */
interface ServiceTypeMapping {
    GlobalScopeService: GlobalScopeService;
    SignalService: SignalService;
}
/**
 * Represents the global scope service class.
 */
export declare class GlobalScopeService {
    private static readonly instanceKey;
    private constructor();
    /**
     * Gets the singleton instance of the GlobalScopeService.
     * @returns The singleton instance of the GlobalScopeService.
     */
    static getInstance(): GlobalScopeService;
    /**
     * Sets the singleton instance of a service.
     * @param key - The key associated with the service type.
     * @param instance - The instance of the service.
     */
    static setSingletonInstance<K extends keyof ServiceTypeMapping>(key: K, instance: ServiceTypeMapping[K]): void;
    /**
     * Gets the singleton instance of a service.
     * @param key - The key associated with the service type.
     * @returns The singleton instance of the service, or undefined if not found.
     */
    static getSingletonInstance<K extends keyof ServiceTypeMapping>(key: K): ServiceTypeMapping[K] | undefined;
}
export {};