 	// Data separator (e.g. ',' or ';' for CSV (comma not recommended in Europe, prefer semicolon), '\t' for TSV
 	let separator = "\t"
 
+	// A map showing open and blocked cells
+	// Can be generated with config->tools->buildObstructionMask=true
 	var obstructionMask: CellMap<Character>?
 
 	init(config: NSDictionary) {

	}



	/// Final statistics collection routine
	func finalCollection(onCity city: City) {

			scheduledCollectionTime += interval
		} while scheduledCollectionTime < city.events.stopTime

		// Schedule an init-stage event to set up the statistics module
		let statisticsSetupEvent = SimulationEvent(time: 0, type: .Statistics, action: {city.stats.initialSetup(onCity: city)}, description: "initialStatsSetup")
		city.events.add(initialEvent: statisticsSetupEvent)

		// Schedule a cleanup-stage event to collect final statistics
		let finalCollectionEvent = SimulationEvent(time: 0, type: .Statistics, action: {city.stats.finalCollection(onCity: city)}, description: "finalCollectStats")
		city.events.add(cleanupEvent: finalCollectionEvent)
