export declare class InjectionToken<T = any> {
    description: string;
    readonly symbol: symbol;
    constructor(description: string);
    toString(): string;
}
export type Constructor<T = any> = new (...args: any[]) => T;
export type Token<T = any> = Constructor<T> | InjectionToken<T> | symbol | string;
export type ForwardRefFn<T = any> = () => Token<T>;
export type MaybeForwardRef<T = any> = Token<T> | {
    __forward_ref__: ForwardRefFn<T>;
};
export declare function forwardRef<T>(fn: ForwardRefFn<T>): {
    __forward_ref__: ForwardRefFn<T>;
};
export declare function resolveForwardRef<T>(t: MaybeForwardRef<T>): Token<T>;
export declare function describeToken(token: Token): string;
//# sourceMappingURL=tokens.d.ts.map