docs: def get_tasks_changed_since(self, since):
          """ Returns a list of tasks that were changed recently."""
          changed_tasks = []
  
          for task in self.client.filter_tasks({'status': 'pending'}):
              if task.get(
                  'modified',
                  task.get(
                      'entry',
                      datetime.datetime(2000, 1, 1).replace(tzinfo=pytz.utc)
                  )
              ) >= since:
                  changed_tasks.append(task)
  
          return changed_tasks