Supporting the optional 'extensions' key in http response

[nick-stephen]

The GraphQL response format supports an optional top-level 'extensions' field with a Map value to allow for future extensions.

http://spec.graphql.org/draft/#sec-Response

This is missing today from DataFetcherResult although it has been included as a sub-field in the GraphQLError type

I'd like to be able to optionally provide information such a profiling data and/or optimization hints in my query responses, without there being an error to return.

Are there any plans to add this field to DataFetcherResult? If not and there are no objections, I may work on a merge request...

[nick-stephen]

d'oh - this is coming from graphql-java - please ignore. Will raise thread with them.