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:   id: ID!
    name: String
    needsGradingCount: Int
  
    # specifies that this assignment is only assigned to students for whom an
    #        `AssignmentOverride` applies.
    onlyVisibleToOverrides: Boolean
  
    # the assignment is out of this many points
    pointsPossible: Float
  