import { Observable } from 'rxjs';
import { ContentEditableElement } from '../../editors/base/contentEditableEditor';
import { ElementSelectionService } from './elementSelectionService';
/** Allows the Tab key to change focus only from the start or end of the editor. */
export declare function createContentEditableTabKeyService(element$: Observable<ContentEditableElement | null>, selectionService: ElementSelectionService): import("../..").Service;