code: def content(self):
          ''' Return report content as a string if mode == STRINGIO else an empty string '''
          if isinstance(self.__report_file, io.StringIO):
              return self.__report_file.getvalue()
          else:
              return 'f content(self):
          ''' Return report content as a string if mode == STRINGIO else an empty string '''
          if isinstance(self.__report_file, io.StringIO):
              return self.__report_file.getvalue()
          else:
              return ''
docs: Return report content as a string if mode == STRINGIO else an empty string