import { BaseService, Service } from '../base/service';
export interface IndentService extends Service {
    readonly canIndent: boolean;
    readonly canOutdent: boolean;
    indent(): void;
    outdent(): void;
}
export declare const NULL_INDENT_SERVICE: IndentService;
export declare function createCombinationIndentService(...indentServices: IndentService[]): IndentService;
export declare class CombinationIndentService extends BaseService implements IndentService {
    constructor(...indentServices: IndentService[]);
    private readonly indentServices;
    get canIndent(): boolean;
    get canOutdent(): boolean;
    indent(): void;
    outdent(): void;
}