code: def test_time_series_multiple_requests(self):
      self._write_scalar_data("run1", "scalars/tagA", [0])
      self._write_scalar_data("run2", "scalars/tagB", [1])
  
      self._multiplexer.Reload()
  
      requests = [
          {"plugin": "scalars", "tag": "scalars/tagA"},
          {"plugin": "scalars", "tag": "scalars/tagB"},
          {"plugin": "scalars", "tag": "scalars/tagB"},
      ]
      response = self._plugin._time_series_impl(
          context.RequestContext(), "", requests
      )
      clean_response = self._clean_time_series_responses(response)
  
      self.assertEqual(
          [
              {
                  "plugin": "scalars",
                  "runToSeries": {
                      "run1": [
                          {
                              "step": 0,
                              "value": 0.0,
                              "wallTime": "<wall_time>",
                          },
                      ],
                  },
                  "tag": "scalars/tagA",
              },
              {
                  "plugin": "scalars",
                  "runToSeries": {
                      "run2": [
                          {
                              "step": 0,
                              "value": 1.0,
                              "wallTime": "<wall_time>",
                          },
                      ],
                  },
                  "tag": "scalars/tagB",
              },
              {
                  "plugin": "scalars",
                  "runToSeries": {
                      "run2": [
                          {
                              "step": 0,
                              "value": 1.0,
                              "wallTime": "<wall_time>",
                          },
                      ],
                  },
                  "tag": "scalars/tagB",
              },
          ],
          clean_response,
      )
  
imports: import argparse
  import collections.abc
  import os.path
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorboard import context
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.image import metadata
  from tensorboard.plugins.metrics import metrics_plugin
label_desc: Use image node_id 20 for calling the MetricsPluginTest obj's underlying member method code with example usage: obj.test_time_series_multiple_requests() without return types