code: def get_property_names(obj):
          
          property_names = []
          
          for property_name in dir(obj):
  
              property = getattr(obj, property_name)
  
              if PropertyReflector._is_property(property, property_name):
                  property_names.append(property_name)
  
          return property_names
docs: Gets names of all properties implemented in specified object.
  
          :param obj: an objec to introspect.
  
          :return: a list with property names.