export declare abstract class FileSystem {
    abstract readonly root: string;
    abstract readonly sep: string;
    abstract readonly type: "zip" | "path";
    abstract readonly writeable: boolean;
    abstract join(...paths: string[]): string;
    abstract isDirectory(name: string): Promise<boolean>;
    abstract existsFile(name: string): Promise<boolean>;
    abstract readFile(name: string, encoding: "utf-8" | "base64"): Promise<string>;
    abstract readFile(name: string, encoding: undefined): Promise<Uint8Array>;
    abstract readFile(name: string): Promise<Uint8Array>;
    abstract readFile(name: string, encoding?: "utf-8" | "base64"): Promise<Uint8Array | string>;
    /**
     * Get the url for a file entry. If the system does not support get url. This should return an empty string.
     */
    getUrl(name: string): string;
    abstract listFiles(name: string): Promise<string[]>;
    missingFile(name: string): Promise<boolean>;
    walkFiles(target: string, walker: (path: string) => void | Promise<void>): Promise<void>;
}