GraphQLAnnotations causes ClassCastException

[shevek]

GraphQLAnnotations.java:

    public GraphQLObjectType object(Class<?> object) throws GraphQLAnnotationsException {

It's legitimate for this to be a GraphQLUnionType, which does not extend GraphQLObjectType. The sub-method being called has type <T [extends ...]> T

[yarinvak]

but the method object generates only GraphQLObjectTypes, so creating a GraphQLUnion using this method is incorrect

[shevek]

Yes, but an unadorned CCE isn't the most helpful way to tell the user that.