HBASE-7114 Increment does not extend Mutation but probably should

[Ted Yu]

Hi,
I want to get opinion on whether we should proceed with HBASE-7114
'Increment does not extend Mutation but probably should' in trunk.

Is anyone using Increment.setWriteToWAL or Increment.getFamilyMap ?
For Increment.setWriteToWAL, are you using the Increment returned ?

Your feedback would be appreciated.