/**
 * Service Locator (simple DI container)
 * Provides centralized access to services throughout the application
 */
export declare class ServiceLocator {
    private static instance;
    private readonly services;
    private readonly logger;
    private constructor();
    /**
     * Get singleton instance
     */
    static getInstance(): ServiceLocator;
    /**
     * Register default services
     */
    private registerDefaultServices;
    /**
     * Register a service
     */
    register<T>(key: string, service: T): void;
    /**
     * Resolve a service
     */
    resolve<T>(key: string): T;
    /**
     * Check if service is registered
     */
    has(key: string): boolean;
    /**
     * Get all registered service keys
     */
    keys(): string[];
    /**
     * Reset all services (for testing)
     */
    reset(): void;
}
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