docs: def update_model(raw_model, app_model, forbidden_keys=None, inverse=False):
      """Updates the `raw_model` according to the values in the `app_model`.
  
      :param raw_model: Raw model which gets updated.
      :param app_model: App model holding the data.
      :param forbidden_keys: Data/attributes which will not be updated.
      :type forbidden_keys: list
      :param inverse: If the value is `True` all `app_model` attributes which are contained in the `raw_model` are
                      updated. If the value is `False` all `raw_model` properties which are in the `app_model` will be
                      updated.
      """
      if forbidden_keys is None:
          forbidden_keys = []
  
      if type(app_model) != dict:
          app_model = app_model.__dict__
  
      if inverse:
          for k in app_model:
              logging.debug("Considering property {0}.".format(k))
              if (hasattr(raw_model, k)) and (k not in forbidden_keys):
                  logging.debug("Setting property {0} to value '{1}'.".format(k, app_model[k]))
                  setattr(raw_model, k, app_model[k])
      else:
          for k in raw_model.__dict__:
              logging.debug("Considering property {0}.".format(k))
              if (k in app_model) and (k not in forbidden_keys):
                  logging.debug("Setting property {0} to value '{1}'.".format(k, app_model[k]))
                  setattr(raw_model, k, app_model[k])