code: public static CompletableFuture<IMessageSession> acceptSessionFromConnectionStringAsync(String amqpConnectionString, String sessionId) {
          return acceptSessionFromConnectionStringAsync(amqpConnectionString, sessionId, DEFAULTRECEIVEMODE);
      }
docs: Accept a {@link IMessageSession} in default {@link ReceiveMode#PEEKLOCK} mode asynchronously from service bus connection string with specified session id. Session Id can be null, if null, service will return the first available session.
  
  @param amqpConnectionString the connection string
  @param sessionId            session id, if null, service will return the first available session, otherwise, service will return specified session
  @return a CompletableFuture representing the pending session accepting