Interface Visitor<T>

interface Visitor<T> {
    _: (name: string, value: any) => T;
    displayData: (value: JupyterDisplayDataOutputEvent) => T;
    error: (value: JupyterErrorOutputEvent) => T;
    executeRequested: (value: JupyterExecuteReqeustedOutputEvent) => T;
    executeResult: (value: JupyterExecuteResultOutputEvent) => T;
    executeStart: (value: JupyterExecuteStartOutputEvent) => T;
    stream: (value: JupyterStreamOutputEvent) => T;
}