code: def test_dump(self):
      # test dump
      self.assertEqual(
          {
              "x": [
                  "EU",
                  "rejects",
                  "German",
                  "call",
                  "to",
                  "boycott",
                  "British",
                  "lamb",
                  ".",
              ],
              "y": [
                  "B-ORG",
                  "O",
                  "B-MISC",
                  "O",
                  "O",
                  "O",
                  "B-MISC",
                  "O",
                  "O",
              ],
              "sample_id": None,
          },
          ner_sample.dump(),
      )
  
file_path: textflint/test/input/component/sample/test_ner_sample.py
imports: import unittest
  from textflint.input.component.sample.ner_sample import *
label_desc: Use image node_id 12 for calling the TestNERSample obj's underlying member method code with example usage: obj.test_dump() without return types