code: def test_correl_table(fitresult, capsys):
      """Verify that ``correl_table`` is not empty."""
      table_lines = correl_table(fitresult.params).split("\n")
      nvarys = fitresult.nvarys
  
      assert len(table_lines) == nvarys + 4
      assert len(table_lines[5]) > nvarys * 10
  
imports: import numpy
  import pytest
  import lmfit
  from lmfit import Minimizer, Parameters, ci_report, conf_interval, fit_report, report_ci, report_fit
  from lmfit.lineshapes import gaussian
  from lmfit.models import GaussianModel
  from lmfit.printfuncs import alphanumeric_sort, correl_table, fitreport_html_table, getfloat_attr, gformat
label_desc: Use image node_id 12 for calling a global function with example usage: test_correl_table(fitresult, capsys) without return types