import { Config } from "joist-codegen";
/** A super-simple file system abstraction for testing. */
export interface Fs {
    load(fileName: string): Promise<string | undefined>;
    save(fileName: string, content: string): Promise<void>;
    exists(fileName: string): Promise<boolean>;
}
/** A real implementation of `Fs` that writes to the `prefix` directory. */
export declare function newFsImpl(prefix: string): Fs;
export declare function sortKeys<T extends object>(o: T): T;
export declare function getImportExtension(config: Config): "ts" | "js" | null;
export declare function getEntitiesImportPath(config: Config): string;
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