input: def generate_store_item(item_id: int, name: str, price: float, description: str) -> dict:
      """ Generate a dictionary representation of an online store item with the given fields.
      >>> generate_store_item(1, 'Laptop', 999.99, 'High-performance laptop')
      {'item_id': 1, 'name': 'Laptop', 'price': 999.99, 'description': 'High-performance laptop'}
      >>> generate_store_item(2, 'Mouse', 19.99, 'Wireless mouse')
      {'item_id': 2, 'name': 'Mouse', 'price': 19.99, 'description': 'Wireless mouse'}
      """
output:     return {
          'item_id': item_id,
          'name': name,
          'price': price,
          'description': description
      }