input: 
  def find_largest_number(numbers: List[int]) -> int:
      """ Identify the largest number in the given list.
      >>> find_largest_number([1000, 506, 299, 620, 35])
      1000
      >>> find_largest_number([7, 15, 90, 101, 55, 102])
      102
      """
  
output:     if not numbers:
          return None
      largest = numbers[0]
      for number in numbers:
          if number > largest:
              largest = number
      return largest