code: def test_infobox_default_display_lists(self):
      test_content = ["1", None]
      options = self._add_default_options(info_box_content=test_content)
      symbols = symbol_layer(self.locations, **options)
      display_infos = [
          symbol.display_info_box for symbol in symbols.markers
      ]
      assert display_infos == [True, False]
  
imports: import unittest
  import pytest
  import numpy
  import traitlets
  from ..marker import MarkerOptions, Marker, Markers, Symbol, marker_layer, symbol_layer
label_desc: Use image node_id 13 for calling the SymbolLayer obj's underlying member method code with example usage: obj.test_infobox_default_display_lists() without return types