input: Write a python function to create a TimeSeries class with an initializer and a method to retrieve the values.
  assert TimeSeries([1, 2, 3]).get_values() == [1, 2, 3]
  assert TimeSeries([10, 20, 30, 40]).get_values() == [10, 20, 30, 40]
  assert TimeSeries([]).get_values() == []
output: class TimeSeries:
      def __init__(self, values):
          self.values = values
      
      def get_values(self):
          return self.values