code: def resume_forward(self, fh, resume, file_location, error_log):
          
          if resume:
              if not error_log:
                  raise CannotResumeException("--error-log not provided.")
  
              skip_lines = self.resume(file_location, error_log)
              for _ in range(skip_lines):
                  next(fh)
docs: Forwards `fh` n lines, where n lines is the amount of lines we should
          skip in order to resume our previous scan, if resume is required by the
          user.
          @param fh: fh to advance.
          @param file_location: location of the file handler in disk.
          @param error_log: location of the error_log in disk.