code: def _send_events(self, a_request):
      if not a_request or not a_request.requests:
          return
  
      try:
          if self._offline_log_filename:
              with open(
                  self._offline_log_filename.as_posix(), "at"
              ) as f:
                  f.write(
                      json.dumps(
                          [b.to_dict() for b in a_request.requests]
                      )
                      + "\n"
                  )
              return
  
          # if self._thread is None:
          #     self._log_stderr('Task.close() flushing remaining logs ({})'.format(self.pending))
          res = self.session.send(a_request)
          if res and not res.ok():
              # noinspection PyProtectedMember
              TaskHandler._log_stderr(
                  "failed logging task to backend ({:d} lines, {})".format(
                      len(a_request.requests), str(res.meta)
                  ),
                  level=WARNING,
              )
      except MaxRequestSizeError:
          # noinspection PyProtectedMember
          TaskHandler._log_stderr(
              "failed logging task to backend ({:d} lines) log size exceeded limit".format(
                  len(a_request.requests)
              ),
              level=WARNING,
          )
      except Exception as ex:
          # noinspection PyProtectedMember
          TaskHandler._log_stderr(
              "Retrying, failed logging task to backend ({:d} lines): {}".format(
                  len(a_request.requests), ex
              )
          )
          # we should push ourselves back into the thread pool
          if self._queue:
              self._queue.put(a_request)
  
imports: import json
  import sys
  from pathlib2 import Path
  from logging import LogRecord, getLogger, basicConfig, getLevelName, INFO, WARNING, Formatter, makeLogRecord, warning
  from logging.handlers import BufferingHandler
  from .development.worker import DevWorker
  from ...backend_api.services import events
  from ...backend_api.session.session import MaxRequestSizeError
  from ...config import config
  from ...utilities.process.mp import BackgroundMonitor, ForkEvent, ForkQueue
  from ...utilities.process.mp import SafeQueue, SafeEvent
label_desc: Use image node_id 4 for calling the BackgroundLogService obj's underlying member method code with example usage: obj._send_events(a_request) without return types