code: def movies_released_in(self, year):
          
          return [movie for movie in self._movie_finder.find_all()
                  if movie.year == year]
docs: Return list of movies that were released in certain year.
  
          :param year: Release year
          :type year: int
  
          :rtype: list[movies.models.Movie]
          :return: List of movie instances.