extends Reference var blackboard = {} func set(key, value, blackboard_name = 'default'): if not blackboard.has(blackboard_name): blackboard[blackboard_name] = {} blackboard[blackboard_name][key] = value func get(key, default_value = null, blackboard_name = 'default'): if has(key, blackboard_name): return blackboard[blackboard_name].get(key, default_value) return default_value func has(key, blackboard_name = 'default'): return blackboard.has(blackboard_name) and blackboard[blackboard_name].has(key) and blackboard[blackboard_name][key] != null func erase(key, blackboard_name = 'default'): if blackboard.has(blackboard_name): blackboard[blackboard_name][key] = null