import * as nodefs from "node:fs";
import type ts from "typescript";
export declare class ProjectFileCache {
    private files;
    private filesystem;
    constructor(filenames: string[], fs?: typeof nodefs);
    has(fileName: string): boolean;
    set(fileName: string, snapshot?: ts.IScriptSnapshot): void;
    remove(fileName: string): void;
    removeAll(): void;
    getFileNames(): string[];
    getVersion(fileName: string): string | undefined;
    getSnapshot(fileName: string): ts.IScriptSnapshot | undefined;
}
export declare class ExternalFileCache {
    private files;
    private filesystem;
    constructor(fs?: typeof nodefs);
    getSnapshot(fileName: string): ts.IScriptSnapshot;
}
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