import { CustomKey } from './custom-key';
import { TypeExtensionMetadataCtor } from './type-extension-metadata-ctor';
/**
 * Type extension metadata constructor set key.
 *
 * @type {CustomKey<Set<TypeExtensionMetadataCtor<any, any, any>>>}
 */
export declare const TYPE_EXTENSION_METADATA_CTOR_SET_KEY: CustomKey<Set<TypeExtensionMetadataCtor<any, any, any>>>;
//# sourceMappingURL=type-extension-metadata-ctor-set-key.d.ts.map