code: def test_timeline_vertical(self):
      self.tl.add_schema(orient="vertical")
      assert_equal(
          "vertical",
          self.tl.options.get("baseOption")
          .get("timeline")
          .get("orient"),
      )
  
file_path: pyecharts/test/test_timeline.py
imports: import unittest
  from nose.tools import assert_equal
  from pyecharts import options
  from pyecharts.charts import Bar, Timeline
  from pyecharts.commons.utils import JsCode
  from pyecharts.faker import Faker
label_desc: Use image node_id 4 for calling the TestTimeLine obj's underlying member method code with example usage: obj.test_timeline_vertical() without return types