code: def emit(self, item, defaults=None, stencil=None, to_log=False, item_formatter=None):
          
          item_text = self.format_item(item, defaults, stencil)
  
          # Post-process line?
          if item_formatter:
              item_text = item_formatter(item_text)
  
          # For a header, use configured escape codes on a terminal
          if item is None and os.isatty(sys.stdout.fileno()):
              item_text = ''.join((config.output_header_ecma48, item_text, "\x1B[0m"))
  
          # Dump to selected target
          if to_log:
              if callable(to_log):
                  to_log(item_text)
              else:
                  self.LOG.info(item_text)
          elif self.options.nul:
              sys.stdout.write(item_text + '\0')
              sys.stdout.flush()
          else:
              print(item_text)
  
          return item_text.count('\n') + 1
docs: Print an item to stdout, or the log on INFO level.