class_docstr: vocab op test 
class_docstr_tok: ["vocab","op","test"]
code: def setUp(self):
      super().setUp()
  
file_path: delta/core/ops/kernels/simple_vocab_op_test.py
imports: import delta.compat
  from delta.layers.ops import py_x_ops
label_desc: Use image node_id 1 for calling the VocabOpsTest obj's underlying member method code with example usage: obj.setUp() without return types