anchor.diff:                          "page_count": 14,
                           "previous_page": 14,
                           "next_page": 2,
  -                        "first_href": "/groups?page_size=2",
  -                        "previous_href": "/groups?page=14page_size=2",
  -                        "next_href": "/groups?page=2&page_size=2",
  -                        "last_href": "/groups?page=14&page_size=2"
  +                        "first_href": "/user_groups?page_size=2",
  +                        "previous_href": "/user_groups?page=14page_size=2",
  +                        "next_href": "/user_groups?page=2&page_size=2",
  +                        "last_href": "/user_groups?page=14&page_size=2"
                       }
                   },
                   "user_groups": [{
  
positive.code:                         "owner": {
                              "id": "11",
                              "type": "user_groups",
                              "href": "/groups/11"
                          }
                      }
                  }]
  
negative.code: 
  + Response 204
  
  ## UserGroup Collection [/user_groups{?page,page_size,sort,user_id,include}]
  A collection of User Group resources.
  
  All collections add a meta attribute hash containing paging
  