code: def test(self):
      return self.render_template(
          "test_plugin/test.html", content="Hello galaxy!"
      )
  
imports: from __future__ import annotations
  from flask import Blueprint
  from flask_appbuilder import BaseView, expose
  from airflow.executors.base_executor import BaseExecutor
  from airflow.hooks.base import BaseHook
  from airflow.models.baseoperator import BaseOperator
  from airflow.plugins_manager import AirflowPlugin
  from airflow.sensors.base import BaseSensorOperator
  from airflow.ti_deps.deps.base_ti_dep import BaseTIDep
  from airflow.timetables.interval import CronDataIntervalTimetable
  from tests.listeners import empty_listener
  from tests.listeners.class_listener import ClassBasedListener
  from tests.test_utils.mock_operators import AirflowLink, AirflowLink2, CustomBaseIndexOpLink, CustomOpLink, GithubLink, GoogleLink
label_desc: Use image node_id 1 for calling the PluginTestAppBuilderBaseView obj's underlying member method code with example usage: obj.test() and returns: self