export declare class Chain implements Scope {
    readonly name: string;
    readonly parent: null | Scope;
    readonly id: number;
    readonly root: Scope;
    private destroyed;
    private readonly destroyCallbacks;
    constructor(name: string, parent: null | Scope);
    destroy(): void;
    onDestroy(callback: Scope.Callback): void;
}
export interface Scope {
    readonly name: string;
    readonly id: number;
    readonly parent: null | Scope;
    readonly root: Scope;
    onDestroy(callback: Scope.Callback): void;
}
export declare namespace Scope {
    type Callback = (scope: Scope) => void;
    function get(name?: string): null | Scope;
    function run<Result>(name: string, callback: (scope: Scope) => Result | Promise<Result>): Promise<Result>;
}