import { DependencyIdentifier, NormalizedDependencyIdentifier } from './dependencyIdentifier';
import { Ctor } from './dependencyItem';
export interface ForwardRef<T> {
    unwrap(): Ctor<T>;
}
export declare function forwardRef<T>(wrapper: () => Ctor<T>): ForwardRef<T>;
export declare function isForwardRef<T = any>(thing: unknown): thing is ForwardRef<T>;
export declare function normalizeForwardRef<T>(id: DependencyIdentifier<T>): NormalizedDependencyIdentifier<T>;