import { Type } from '@zetapush/platform-legacy';
import { Provider } from '@zetapush/core';
interface FunctionWrapper<T, R> {
    new (func: () => Promise<R>): T;
}
export declare class InstanceHelper<T, R> {
    private provide;
    private funcCallWrapper;
    private errorFactory?;
    private instance?;
    private func?;
    private clazz?;
    constructor(provide: any, funcCallWrapper: FunctionWrapper<T, R> | null, errorFactory?: ((instanceFuncOrClass: any) => Error) | undefined);
    register(func: () => Promise<R>): void;
    register(instance: T): void;
    register(clazz: Type<T>): void;
    getProvider(): Provider | null;
}
export declare const isInstance: (instance: any) => boolean;
export declare const isClass: (clazz: any) => boolean;
export declare const isFunction: (func: any) => boolean;
export {};