code: def testServeSourceFileContentOfThisTestFile(self):
      _generate_tfdbg_v2_data(self.logdir)
      run = self._getExactlyOneRun()
      # First, access the source file list, so we can get hold of the index
      # for this file. The index is required for the request to the
      # "/source_files/file" route below.
      response = self.server.get(
          _ROUTE_PREFIX + "/source_files/list?run=%s" % run
      )
      source_file_list = json.loads(response.get_data())
      index = source_file_list.index(
          [_HOST_NAME, _CURRENT_FILE_FULL_PATH]
      )
  
      response = self.server.get(
          _ROUTE_PREFIX
          + "/source_files/file?run=%s&index=%d" % (run, index)
      )
      self.assertEqual(200, response.status_code)
      self.assertEqual(
          "application/json", response.headers.get("content-type")
      )
      data = json.loads(response.get_data())
      self.assertEqual(data["host_name"], _HOST_NAME)
      self.assertEqual(data["file_path"], _CURRENT_FILE_FULL_PATH)
      with open(__file__, "r") as f:
          lines = f.read().split("\n")
      self.assertEqual(data["lines"], lines)
  
imports: import collections
  import json
  import os
  import socket
  import threading
  import tensorflow
  from werkzeug import test
  from werkzeug import wrappers
  from tensorboard.backend import application
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.debugger_v2 import debug_data_multiplexer
  from tensorboard.plugins.debugger_v2 import debugger_v2_plugin
label_desc: Use image node_id 43 for calling the DebuggerV2PluginTest obj's underlying member method code with example usage: obj.testServeSourceFileContentOfThisTestFile() without return types