code: def test_update_traces_overwrite(self):
      fig = go.Figure(
          data=[
              go.Scatter(marker_line_color="red"),
              go.Bar(marker_line_color="red"),
          ]
      )
  
      fig.update_traces(overwrite=True, marker={"line": {"width": 10}})
  
      self.assertEqual(
          fig.to_plotly_json()["data"],
          [
              {"type": "scatter", "marker": {"line": {"width": 10}}},
              {"type": "bar", "marker": {"line": {"width": 10}}},
          ],
      )
  
imports: from unittest import TestCase
  import inspect
  import copy
  import pytest
  import plotly.graph_objs
  from plotly.subplots import make_subplots
  from functools import reduce
label_desc: Use image node_id 14 for calling the TestSelectForEachUpdateTraces obj's underlying member method code with example usage: obj.test_update_traces_overwrite() without return types