Start all the managed server parallely by connecting to nodemanager?

We can start managed server by connecting to domainURL, This has feature that if we set the flag block = “false” which ensures that the server start command does not wait for the server to start before returning. It's like Threaded style calling behavior where we can place a number of these calls in a loop to rapidly start a number of servers at once.

I am looking for similar features when we Connect to nodemanager to starts the Managed server. Any help is appreciated.

approach 1:

Connecting to domain/Adminserver to start the managed server:

connect(nmUser,nmPass,domainURL)

start(manager_server_name,block='false')