Dien Vo

contrib/99designs/gqlgen/tracer.go: nil check response

5

### What does this PR do? Check result from graphql responseHandler is nil related to issue https://github.com/DataDog/dd-trace-go/issues/2791 ### Motivation I think I need contribute to community ### Reviewer's Checklist -...

I was implement graphQL subscription, it just a simple subscription like this (https://gqlgen.com/recipes/subscriptions/) but I want to stop the subscription in server side so I close the response channel when...