code: def get_catalog_courses(self, catalog_id):
          
          return self._load_data(
              self.CATALOGS_COURSES_ENDPOINT.format(catalog_id),
              default=[]
          )
docs: Return the courses included in a single course catalog by ID.
  
          Args:
              catalog_id (int): The catalog ID we want to retrieve.
  
          Returns:
              list: Courses of the catalog in question