# Retrieves statistics about the collection.
	#
	# Returns `null` if an error occured. See `Sys::last_mongoc_error`.
	#
	# ~~~
	# var client = new MongoClient("mongodb://mongo:27017/")
	# var db_suffix = "NIT_TESTING_ID".environ
	# var db_name = "test_{db_suffix}"
	# var db = client.database(db_name)
	# var col = db.collection("test")
	# assert col.stats["ns"] == "{db_name}.test"
	# ~~~
	fun stats: nullable JsonObject do
		var bson = native.stats
		if bson == null then return null
		return new JsonObject.from_bson(new BSON(bson))
	end