input: def StringCaseModifier(string: str) -> str:
      """
      A Python class to modify the case of the string. The class provides methods to convert 
      the string to all uppercase, all lowercase, and title case.
      >>> StringCaseModifier('Hello World').to_upper()
      'HELLO WORLD'
      >>> StringCaseModifier('Hello World').to_lower()
      'hello world'
      >>> StringCaseModifier('Hello World').to_title()
      'Hello World'
      """
      def __init__(self, string):
          self.string = string
  
      def to_upper(self):
          return self.string.upper()
  
      def to_lower(self):
          return self.string.lower()
      
      def to_title(self):
          return self.string.title()
output:     def __init__(self, string):
          self.string = string
  
      def to_upper(self):
          return self.string.upper()
  
      def to_lower(self):
          return self.string.lower()
      
      def to_title(self):
          return self.string.title()