code: def set_commercial_property_type(self, commercial_property_type):
          
  
          if not isinstance(commercial_property_type, CommercialType):
              raise DaftException("commercial_property_type should be an instance of CommercialType.")
  
          self._commercial_property_type = str(commercial_property_type)
docs: Use the CommercialType object to set the commercial property type.
          :param commercial_property_type:
          :return: