class_docstr: Metrics Plugin for TensorBoard.
code: def get_plugin_apps(self):
      return {
          "/tags": self._serve_tags,
          "/timeSeries": self._serve_time_series,
          "/imageData": self._serve_image_data,
      }
  
imports: import collections
  import imghdr
  import json
  from werkzeug import wrappers
  from tensorboard import errors
  from tensorboard import plugin_util
  from tensorboard.backend import http_util
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.histogram import metadata
  from tensorboard.plugins.image import metadata
  from tensorboard.plugins.metrics import metadata
  from tensorboard.plugins.scalar import metadata
label_desc: Use image node_id 3 for calling the MetricsPlugin obj's underlying member method code with example usage: obj.get_plugin_apps() and returns: dict