Require stud/buffer, flush() must be public.
Require stud/buffer, flush() must be public.

Aloomaio/logstash-kafka,joekiller/logstash-kafka,Aloomaio/logstash-kafka,joekiller/logstash-kafka,opentable/logstash-kafka,tinglinux/logstash-kafka,opentable/logstash-kafka,tinglinux/logstash-kafka