input: def StringCaseModifier(string: str) -> str:
      """ A Python class to modify the case of the string
      >>> StringCaseModifier('Hello World').to_upper()
      'HELLO WORLD'
      >>> StringCaseModifier('Hello World').to_lower()
      'hello world'
      >>> StringCaseModifier('Hello World').to_title()
      'Hello World'
      """
      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:     class StringCaseModifier:
          def __init__(self, string: str):
              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()