code: function (k, v) {
          checkJobs.push(function (checkDone) {
            api.elasticsearch.search(self.alias, [k], [v], 0, 2, null, 1, function (error, results) {
              if (error) { return checkDone(error) }
              if (results.length === 0) { return checkDone() }
              if (results.length === 1 && results[0].guid === self.data.guid) { return checkDone() }
              return checkDone(new Error('uniqueFields:' + k + ' uniqueness violated via #' + results[0].guid))
            })
          })
        }
docs: We need to ensure that none of the params this new instance has match an existing instance.