Github user steveblackmon commented on the pull request:
https://github.com/apache/incubator-streams/pull/133#issuecomment-63540065
IMO all providers should have a option to emit unaltered json String, and
that should be the default behavior. Easy enough to add a processor to convert
it to Activity or other Entity, but if that conversion is embedded within the
Provider it's harder to get it back to its original form there-after.
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