anchor.diff:                          "lens_type": "50mm"
                       },
                       "links": {
  -                        "project": "1",
  -                        "owner": {
  -                            "id": "2",
  -                            "href": "/users/2",
  -                            "type": "users"
  -                        }
  +                        "project": "1"
                       }
                   },{
                       "id": "2",
  
positive.code:                         "lens_type": "50mm"
                      },
                      "links": {
                          "project": "1",
                          "owner": {
                              "id": "4",
                              "href": "/groups/4",
                              "type": "user_groups"
                          }
                      }
                  }]
              }
  
negative.code: 
  + Response 204
  
  ## Classification Collection [/classifications{?page,per_page,sort,project_id,user_group_id,include,for}]
  A representation of all the Classifications in a collection
  
  All collections add a *meta* attribute hash containing
  