import { AfterAction } from './after-action';
import * as i0 from "@angular/core";
export declare class CallChainService {
    constructor();
    /**
     * Creates a call chain `Subject` that performs an action when a value is emitted into it.
     *
     * Useful for creating call chains for methods like [assign Task]{@link AssignTaskService#assign}.
     * By using this function you don't have to handle the `Subject` logic and can only focus on the callback.
     * This can make the code easier to understand as the intent is not obscured by the `Subject` handling.
     *
     * @param callback the function that should be executed when a value is emitted into the `Subject`.
     * The emitted value is passed as the argument.
     * @returns a subscribed `Subject` instance that performs the provided `callback` on the first emission and then completes
     */
    create(callback: (boolean: any) => void): AfterAction;
    static ɵfac: i0.ɵɵFactoryDeclaration<CallChainService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CallChainService>;
}