code: def test_slice_string(self):
      def fn(x: str):
          return x[slice(None, 3, 1)]
  
      self.checkScript(fn, ("foo_bar",))
  
imports: import os
  import sys
  import torch
  from typing import List
  from torch.testing._internal.jit_utils import JitTestCase
label_desc: Use image node_id 10 for calling the TestSlice obj's underlying member method code with example usage: obj.test_slice_string() and returns: x