code: def test_concat(styler):
      result = styler.concat(styler.data.agg(["sum"]).style).to_latex()
      expected = dedent(
          """\
      \\begin{tabular}{lrrl}
       & A & B & C \\\\
      0 & 0 & -0.61 & ab \\\\
      1 & 1 & -1.22 & cd \\\\
      sum & 1 & -1.830000 & abcd \\\\
      \\end{tabular}
      """
      )
      assert result == expected
  
imports: from textwrap import dedent
  import numpy
  import pytest
  from pandas import DataFrame, MultiIndex, Series, option_context
  from pandas.io.formats.style import Styler
  from pandas.io.formats.style_render import _parse_latex_cell_styles, _parse_latex_css_conversion, _parse_latex_header_span, _parse_latex_table_styles, _parse_latex_table_wrapping
label_desc: Use image node_id 53 for calling a global function with example usage: test_concat(styler) without return types