code: async def process_events_async(self, context, messages):
          
          logger.info("Events processed {}".format(context.sequence_number))
          await context.checkpoint_async()
docs: Called by the processor host when a batch of events has arrived.
          This is where the real work of the event processor is done.
          :param context: Information about the partition
          :type context: ~azure.eventprocessorhost.PartitionContext
          :param messages: The events to be processed.
          :type messages: list[~azure.eventhub.common.EventData]