input: from typing import List
  
  def design_data_structure() -> str:
      """ Design a data structure in Python to store integer values.
      The class should have:
      1. a method to add an integer value to the internal storage.
      2. a method to find the minimum integer value in the internal storage.
      Return the entire class as a string.
      Example:
      for design_data_structure() == "class IntList:\n    def __init__(self):\n        self.values = []\n    def add_value(self, value):\n        self.values.append(value)\n    def find_min(self):\n        return min(self.values)"
      """
output:     
  class IntList:
      def __init__(self):
          self.values = []
      def add_value(self, value):
          self.values.append(value)
      def find_min(self):
          return min(self.values)
  