import { ElementViewModel } from '@devexpress/analytics-core/analytics-elements';
import { ISelectionTarget } from '@devexpress/analytics-core/analytics-internal';
import { BandViewModel } from '../bands/xrBand';
import { Observable } from 'knockout';
export declare function base64UTF16LEtobase64UTF8(base64UTF16: string, resultCallback: any): void;
export declare function _isReorderBand(dropTarget: ISelectionTarget, dragFrom: ElementViewModel): boolean;
export declare function _isMarginBand(band: BandViewModel): boolean;
export declare function _isPageBand(band: BandViewModel): boolean;
export declare const availableFonts: Observable<{
    [key: string]: string;
}>;
export declare function addPropertyToGroup(groupName: any, property: any): void;