anchor.diff:      key: String!
       public: Boolean = true
     ): [OrderedSet]
  +  page(id: ID!): Page!
   
     # A Partner
     partner(
  
positive.code: 
  union OrderParty = Partner | User
  
  type PageCursor {
    # first cursor on the page
    cursor: String!
  
negative.code:     key: String!
      public: Boolean = true
    ): [OrderedSet]
    page(id: ID!): Page!
  
    # A Partner
    partner(
  