import { BinaryImageRef, FileApi, FileInitData, FileRef, LocalFile } from './FileApiProvider';
export declare class GatewayFileApi implements FileApi {
    private fileApis;
    constructor(...fileApis: FileApi[]);
    init(data: FileInitData): void;
    reset(ref?: FileRef): void;
    isAvailable(): Promise<boolean>;
    getDisplayUri(ref: FileRef): Promise<string | null>;
    getBinaryImageUri(ref: BinaryImageRef): Promise<string | null>;
    getLocalCopy(ref: FileRef): Promise<LocalFile | null>;
    openInExternalApp(ref: FileRef): Promise<void>;
    saveToDevice(ref: FileRef): Promise<boolean>;
}