input: Write a python function to get the top 5 restaurants from a Yelp API response.
  assert get_top_restaurants({'businesses': [{'name': 'R1'}, {'name': 'R2'}, {'name': 'R3'}, {'name': 'R4'}, {'name': 'R5'}, {'name': 'R6'}]}) == [{'name': 'R1'}, {'name': 'R2'}, {'name': 'R3'}, {'name': 'R4'}, {'name': 'R5'}]
  assert get_top_restaurants({'businesses': [{'name': 'A'}, {'name': 'B'}, {'name': 'C'}]}) == [{'name': 'A'}, {'name': 'B'}, {'name': 'C'}]
  assert get_top_restaurants({'businesses': []}) == []
output: def get_top_restaurants(response):
      return response['businesses'][:5]