numRepetitions
The number of times to repeat the session, which is always 1.
simulatedClientNum
The simulated client number (ordinal 1) used to distinguish this simulated client from other simulated clients in the
same mlreplay instance.
numSimulatedClients
The total number of simulated clients in this mlreplay instance.
namesAndValues
The set of defined names and values used to customize replay behavior.
The simulated client is not created when this callback returns false and additional simulated clients are still created. This
callback is called once per simulated client per mlreplay instance.