new_contents: from __future__ import absolute_import
  
  import logging
  
  from .base import MetricsBackend
  
  
  logger = logging.getLogger('sentry.metrics')
  
  
  class LoggingBackend(MetricsBackend):
      def incr(self, key, instance=None, tags=None, amount=1, sample_rate=1):
          logger.debug('%r: %+g', key, amount, extra={
              'instance': instance,
              'tags': tags or [],
          })
  
      def timing(self, key, value, instance=None, tags=None, sample_rate=1):
          logger.debug('%r: %g ms', key, value, extra={
              'instance': instance,
              'tags': tags or [],
          })
  
subject: Add metrics `LoggingBackend`.