Gets the arrivals' monitored data (if any).
get_mon_arrivals(envs, per_resource = FALSE)the simulation environment (or a list of environments).
whether the activity should be reported on a per-resource basis (by default: FALSE).
Returns a data frame.
Other methods for dealing with a simulation environment: simmer, reset, now, peek, onestep, run, add_resource, add_generator, get_mon_attributes, get_mon_resources, get_n_generated, get_capacity, get_queue_size, set_capacity, set_queue_size, get_server_count, get_queue_count.