docs: def _getCharFont(self, font_files, code_point):
          """
          Returns font files containing given code point.
          """
          return_font_files = []
          for font_file in font_files:
              face = ft.Face(font_file)
              if face.get_char_index(code_point):
                  return_font_files.append(font_file)
          return return_font_files