Warning when use GraphQLNonNull or GraphQLList

[amjedomar]

The official graphql-js document refers that GraphQLNonNull is a class so if I want to use it I have to instantiate it and then pass a valid graphql type to it

But when I do that the IDE that I use (WebStorm) show me a warning about that:

Interface can not be instantiated

However, the warning disappears when I use it without instantiating it (without writing new keyword before it)

This problem is also happening with GraphQLList

[mjmahone]

This is intentional: the types are interfaces, and GraphQLNonNull(ofType) is a method to get you a concrete instance of the GraphQLNonNull. This for instance helps prevent usages of instanceof that have caused issues in the past.