/**
 * Tracks active data source names at runtime in order to prevent multiple
 * data sources from being registered under the same name. Registering two
 * data sources with the same name is unsupported by TypeORM — the second
 * registration silently overrides the first — which is a common source
 * of hard-to-debug configuration issues.
 */
export declare class DataSourceNameRegistry {
    private static readonly logger;
    private static readonly registeredNames;
    static register(dataSourceName: string): void;
    static unregister(dataSourceName: string): void;
    static has(dataSourceName: string): boolean;
    static clear(): void;
}