export declare class JSONSchema {
    private templates;
    private yamlScene;
    private _removedKeyName;
    get removedKeyName(): string;
    init(yamlSceneSchema?: string): Promise<void>;
    merge(oldSchema: string): Promise<void>;
    addSchema(...schemaURLs: (string | object)[]): Promise<void>;
    removeSchema(...extensionNames: string[]): void;
    parse(): void;
    save(fout?: string): Promise<string>;
    private getFileData;
    private removeID;
    private replaceID;
    private injectAttrs;
}