input: Write a python function to convert a list of StoreItem objects to a list of dictionaries.
  assert convert_to_dicts([StoreItem(1, "Apple", 0.5, "A fresh apple"), StoreItem(2, "Banana", 0.3, "A ripe banana")]) == [{'item_id': 1, 'name': 'Apple', 'price': 0.5, 'description': 'A fresh apple'}, {'item_id': 2, 'name': 'Banana', 'price': 0.3, 'description': 'A ripe banana'}]
  assert convert_to_dicts([]) == []
  assert convert_to_dicts([StoreItem(3, "Orange", 0.8, "A juicy orange")]) == [{'item_id': 3, 'name': 'Orange', 'price': 0.8, 'description': 'A juicy orange'}]
output: def convert_to_dicts(store_items):
      return [{'item_id': item.item_id, 'name': item.name, 'price': item.price, 'description': item.description} for item in store_items]