export declare function getRoot(): Promise<FileSystemDirectoryHandle>;
export declare function getDirectoryHandle(parent: FileSystemDirectoryHandle, name: string, create?: boolean): Promise<FileSystemDirectoryHandle>;
export declare function getFileHandle(parent: FileSystemDirectoryHandle, name: string, create?: boolean): Promise<FileSystemFileHandle>;
export declare function getFile(fileHandle: FileSystemFileHandle): Promise<File>;
export declare function writeFile(fileHandle: FileSystemFileHandle, buffer: ArrayBuffer): Promise<void>;