old_contents: DEFAULT_SERVER_PORT = 5005
  
  DEFAULT_SERVER_FORMAT = "http://localhost:{}"
  
  DEFAULT_SERVER_URL = DEFAULT_SERVER_FORMAT.format(DEFAULT_SERVER_PORT)
  
  DEFAULT_NLU_FALLBACK_THRESHOLD = 0.0
  
  DEFAULT_CORE_FALLBACK_THRESHOLD = 0.0
  
  DEFAULT_FALLBACK_ACTION = "action_default_fallback"
  
  DEFAULT_REQUEST_TIMEOUT = 60 * 5  # 5 minutes
  
  REQUESTED_SLOT = "requested_slot"
  
  # start of special user message section
  INTENT_MESSAGE_PREFIX = "/"
  
  USER_INTENT_RESTART = "restart"
  
  USER_INTENT_BACK = "back"
  
  USER_INTENT_OUT_OF_SCOPE = "out_of_scope"
  
  ACTION_NAME_SENDER_ID_CONNECTOR_STR = "__sender_id:"
  
  BEARER_TOKEN_PREFIX = "Bearer "
  
  DEFAULT_POLICY_PRIORITY = 1
  MAPPING_POLICY_PRIORITY = 2
  MEMOIZATION_POLICY_PRIORITY = 3
  FALLBACK_POLICY_PRIORITY = 4
  FORM_POLICY_PRIORITY = 5
  
new_contents: DEFAULT_SERVER_PORT = 5005
  
  DEFAULT_SERVER_FORMAT = "http://localhost:{}"
  
  DEFAULT_SERVER_URL = DEFAULT_SERVER_FORMAT.format(DEFAULT_SERVER_PORT)
  
  DEFAULT_NLU_FALLBACK_THRESHOLD = 0.0
  
  DEFAULT_CORE_FALLBACK_THRESHOLD = 0.0
  
  DEFAULT_FALLBACK_ACTION = "action_default_fallback"
  
  DEFAULT_REQUEST_TIMEOUT = 60 * 5  # 5 minutes
  
  REQUESTED_SLOT = "requested_slot"
  
  # start of special user message section
  INTENT_MESSAGE_PREFIX = "/"
  
  USER_INTENT_RESTART = "restart"
  
  USER_INTENT_BACK = "back"
  
  USER_INTENT_OUT_OF_SCOPE = "out_of_scope"
  
  ACTION_NAME_SENDER_ID_CONNECTOR_STR = "__sender_id:"
  
  BEARER_TOKEN_PREFIX = "Bearer "
  
  # the lowest priority intended to be used by machine learning policies
  DEFAULT_POLICY_PRIORITY = 1
  # the priority intended to be used by mapping policy
  MAPPING_POLICY_PRIORITY = 2
  # the priority intended to be used by memoization policies
  # it is higher than default and mapping to prioritize training stories
  MEMOIZATION_POLICY_PRIORITY = 3
  # the priority intended to be used by fallback policies
  # it is higher than memoization to prioritize fallback
  FALLBACK_POLICY_PRIORITY = 4
  # the priority intended to be used by form policies
  # it is the highest to prioritize form to the rest of the policies
  FORM_POLICY_PRIORITY = 5
  
subject: add comments to priority constants