When generating this error on a custom DataFetcher class:
dataFetcherResult.error( GraphQLError.newError().message("custom error") .location( SourceLocation(37, 9) ).path(ResultPath.parse(" /test[0]/test2")).extensions(null).build() )

I noticed that the JSON generated have extensions and classification:

{"errors":[{"message":"custom error","locations":[{"line":37,"column":9}],"path":["test",0,"test2"],"extensions":{"classification":"DataFetchingException"}}],"data":{"test":[]}}

Why do we have a classification section here? Is this part of the spec? How can I disable the whole extensions from appearing in this case?

Testing using v24.1