# Total number of states (potentially) revisited.
	#
	# It is the number of time that a better path to a visited state is found.
	# With astar and a really admissible heuristic, this number should stay 0.
	# So check this value if you are not sure of the heuristic.
	#
	# Note that states are effectively revisited if `do_revisit` is activated.
	var revisits = 0