Make SignalRHub.send<T> method return a value

[Spontifixus]

In a previous project I used the ms-signalr-client package and wrapped the SignalR hub myself. The implementation of the send method there looked somewhat similar to this:

async invoke(hubName: string, methodName: string, ...args: any[]): Promise<any> {
  try {
    let result = await this.connection.proxies[hubName].invoke(methodName, ...args);
    log.debug(`${hubName}.${methodName}`, result);
    return result;
  } catch (error) {
    log.error(log.info(`Error invoking ${hubName}.${methodName}`, error));
    return null;
  }
}

Methods implemented on the Hub can have a return value, and this implementation (or a similar one) ensures that this value can be used by the application consuming the SignalR service.

[Spontifixus]

Maybe it would be an idea to rename the send-method to invoke, to reflect that it cannot only be used to send data to the server but also to receive data from it.