code: def _print_pgfplot_libs_message(data):
      
      pgfplotslibs = ",".join(list(data["pgfplots libs"]))
      tikzlibs = ",".join(list(data["tikz libs"]))
  
      print(70 * "=")
      print("Please add the following lines to your LaTeX preamble:\n")
      print("\\usepackage[utf8]{inputenc}")
      print("\\usepackage{fontspec}  % This line only for XeLaTeX and LuaLaTeX")
      print("\\usepackage{pgfplots}")
      if tikzlibs:
          print("\\usetikzlibrary{" + tikzlibs + "}")
      if pgfplotslibs:
          print("\\usepgfplotslibrary{" + pgfplotslibs + "}")
      print(70 * "=")
      return
docs: Prints message to screen indicating the use of PGFPlots and its
      libraries.