class_docstr: CustomScalars Plugin for TensorBoard.
code: def get_plugin_apps(self):
      return {
          "/download_data": self.download_data_route,
          "/layout": self.layout_route,
          "/scalars": self.scalars_route,
      }
  
imports: import re
  from google.protobuf import json_format
  from werkzeug import wrappers
  from tensorboard import plugin_util
  from tensorboard.backend import http_util
  from tensorboard.compat import tf
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.custom_scalar import layout_pb2
  from tensorboard.plugins.custom_scalar import metadata
  from tensorboard.plugins.scalar import metadata
  from tensorboard.plugins.scalar import scalars_plugin
label_desc: Use image node_id 3 for calling the CustomScalarsPlugin obj's underlying member method code with example usage: obj.get_plugin_apps() and returns: dict