import { Observable, Subject } from 'rxjs';
import { DisplayFactory } from './display-utils';
import { Output, Scope } from './state';
import { AnyVirtualDOM } from '@youwol/rx-vdom';
export declare function extractKeys(obj: {
    [k: string]: unknown;
} | string[]): string;
/**
 * Execute a given javascript statement. This execution is reactive by default.
 *
 * @param _args
 * @param _args.src The source to execute
 * @param _args.scope The entering scope.
 * @param _args.output$ Subject in which output views are sent (when using `display` function).
 * @param _args.displayFactory Factory to display HTML elements when `display` is called.
 * @param _args.invalidated$ Observable that emits when the associated cell is invalidated.
 * @returns Promise over the scope at exit
 */
export declare function executeJsStatement({ src, scope, output$, displayFactory, invalidated$, }: {
    src: string;
    scope: Scope;
    output$: Subject<Output>;
    displayFactory: DisplayFactory;
    invalidated$: Observable<unknown>;
}): Promise<any>;
/**
 * Execute a given javascript source content.
 *
 * @param _args
 * @param _args.src The source to execute
 * @param _args.scope The entering scope.
 * @param _args.output$ Subject in which output views are sent (when using `display` function).
 * @param _args.displayFactory Factory to display HTML elements when `display` is called.
 * @param _args.load The function used to load a submodule from another notebook page.
 * @param _args.invalidated$ Observable that emits when the associated cell is invalidated.
 * @param _args.reactive If true, observables & promises are resolved before cell execution using a `combineLatest`
 * policy.
 * @returns Promise over the scope at exit
 */
export declare function executeJs({ src, scope, output$, displayFactory, load, reactive, invalidated$, }: {
    src: string;
    scope: Scope;
    output$: Subject<AnyVirtualDOM>;
    displayFactory: DisplayFactory;
    load: (path: string) => Promise<{
        [k: string]: unknown;
    }>;
    reactive?: boolean;
    invalidated$: Observable<unknown>;
}): Promise<Scope>;
export declare function parseProgram(src: string): any;
export declare function extractGlobalDeclarations(body: any): {
    const: string[];
    let: string[];
};
export declare function extractUndefinedReferences(body: any, scope?: string[]): any;