code: def _bold(self, string):
      if not string.strip().startswith("\\fB"):
          string = "\\fB" + string
      if not string.strip().endswith("\\fR"):
          string = string + "\\fR"
      return string
  
imports: import argparse
  import datetime
  import os
  import re
  import time
  from textwrap import wrap
label_desc: Use image node_id 5 for calling the ManPageFormatter obj's underlying member method code with example usage: obj._bold(string) and returns: string