input: from typing import List
  
  def get_max_value(numbers: List[int]) -> int:
      """
      Find the largest number from a given list of integers.
      
      >>> get_max_value([2, 4, 1, 6])
      6
      >>> get_max_value([10, 3, 25, 17])
      25
      """
      return max(numbers)
output:     if not numbers:
          return None