code: def testRunsWithInvalidModelCheckpointPath(self):
      checkpoint_file = os.path.join(self.log_dir, "checkpoint")
      f = open(checkpoint_file, "w")
      f.write('model_checkpoint_path: "does_not_exist"\n')
      f.write('all_model_checkpoint_paths: "does_not_exist"\n')
      f.close()
      self._SetupWSGIApp()
  
      run_json = self._GetJson("/data/plugin/projector/runs")
      self.assertEqual(run_json, [])
  
imports: import gzip
  import io
  import json
  import os
  import numpy
  import tensorflow
  import unittest
  from werkzeug import test
  from werkzeug import wrappers
  from google.protobuf import text_format
  from tensorboard.backend import application
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.compat.proto import event_pb2
  from tensorboard.compat.proto import summary_pb2
  from tensorboard.compat import tf
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.projector import projector_config_pb2
  from tensorboard.plugins.projector import projector_plugin
  from tensorboard.util import test_util
label_desc: Use image node_id 5 for calling the ProjectorAppTest obj's underlying member method code with example usage: obj.testRunsWithInvalidModelCheckpointPath() without return types