code: def test_infobox_content_lists(self):
      test_content = ["1", "2"]
      options = self._add_default_options(
          info_box_content=test_content, display_info_box=True
      )
      symbols = symbol_layer(self.locations, **options)
      content_options = [
          symbol.info_box_content for symbol in symbols.markers
      ]
      assert content_options == test_content
  
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 12 for calling the SymbolLayer obj's underlying member method code with example usage: obj.test_infobox_content_lists() without return types