anchor.diff:  
       # Returns the last _n_ elements from the list.
       last: Int
  +
  +    # only include users with the given ids
  +    userIds: [ID!]
     ): UserConnection
   }
   
  
positive.code:   position: Int
    quiz: Quiz
    state: AssignmentState!
  
    # submissions for this assignment
    submissionsConnection(
  
negative.code: type Assignment implements Node, Timestamped {
    # legacy canvas id
    _id: ID!
    assignmentGroup: AssignmentGroup
    course: Course
    createdAt: Time
    description: String
  