Interface Visitor<T>

interface Visitor<T> {
    _: (name: string, value: any) => T;
    binary: (value: OutputRegularBinaryFileType) => T;
    notebook: (value: OutputJupyterNotebookFileType) => T;
    quiz: (value: OutputRegularQuizFileType) => T;
    text: (value: OutputRegularTextFileType) => T;
}