The MetricGroup interface contains methods to create groups and metrics
using an int as a name. The original intention was to allow pattern like
|group.addGroup("subtaskIndex").addGroup(0)| , but this didn't really
work out, with |addGroup(String, String)| serving this use case much
better.
Metric methods accept an int mostly for consistency, but there's no good
use-case for it.
These methods also offer hardly any convenience since all they do is
save potential users from using |String.valueOf| on one argument. That's
doesn't seem valuable enough for something that doubles the size of the
interface.
I propose to remove said method.
https://cwiki.apache.org/confluence/display/FLINK/FLIP-341%3A+Remove+MetricGroup+methods+accepting+an+int+as+a+name
