Generate a callable that can be executed to conduct the training of this model (given the model configuration)

Initialize the termination condition (such as starting timers, etc).

BaseOptimization runner: responsible for scheduling tasks, saving results using the result saver, etc.

Called when the status of the candidate is change.

Called when optimization runner starts execution

Called when any of the summary stats change, for the optimization runner: number scheduled, number completed, number failed, best score, etc.

Called when optimization runner terminates