'Returns a list of every object at certain coordinates.
Imeplementation detail: this uses a naive iteration through every
object inside the wilderness which could cause slow downs when there
are a lot of objects in the map.
Args:
coordinates (tuple): a coordinate tuple like (x, y)
Returns:
[Object, ]: list of Objects at coordinates'

def get_objs_at_coordinates(self, coordinates):

    result = []
    for (item, item_coordinates) in self.itemcoordinates.items():
        if (item is None):
            del self.db.itemcoordinates[item]
            continue
        if (coordinates == item_coordinates):
            result.append(item)
    return result
