class_docstr: string utils test
docstr: tear down 
docstr_tok: ["tear","down"]
code: def tearDown(self):
      """tear down"""
  
imports: import delta.compat
  from delta.layers.ops import py_x_ops
label_desc: Use image node_id 2 for calling the StringUtilsOpTest obj's underlying member method code with example usage: obj.tearDown() without return types