input: Write a python function to create an instance of the Appointment class and retrieve its attributes using the provided methods.
  assert create_appointment("Meeting", "10:00 AM", "Office").get_title() == "Meeting"
  assert create_appointment("Lunch", "12:00 PM", "Restaurant").get_time() == "12:00 PM"
  assert create_appointment("Gym", "5:00 PM", "Fitness Center").get_location() == "Fitness Center"
output: class Appointment:
      def __init__(self, title, time, location):
          self._title = title
          self._time = time
          self._location = location
  
      def get_title(self):
          return self._title
  
      def get_time(self):
          return self._time
  
      def get_location(self):
          return self._location
  
  def create_appointment(title, time, location):
      return Appointment(title, time, location)