'Called when a room gets activated for certain coordinates. This happens
after every object is moved in it.
This can be used to set a custom room desc for instance or run other
customisations on the room.
Args:
coordinates (tuple): the coordinates as (x, y) where room is
located at
caller (Object): the object that moved into this room
room (WildernessRoom): the room object that will be used at that
wilderness location
Example:
An example use of this would to plug in a randomizer to show different
descriptions for different coordinates, or place a treasure at a special
coordinate.'

def at_prepare_room(self, coordinates, caller, room):

    pass
