anchor.diff:  ;; "Result: #<Success [{:n 1} {:n 2}]>"
   ----
   
  +As you can observe, the return value is some kind of wrapper, if you do not worry about it, just
  +deref it with `deref` function or with `@` reader macro for access to its value. If a exception
  +is returned, the deref operation will raise that exception.
  +
   Fetch function also supports a `:chan` parameter on opts, that allows pass own channel with
   transducer:
   
  
positive.code: = suricatta documentation
  Andrey Antukh, <niwi@niwi.be>
  0.3.0-SNAPSHOT
  :toc: left
  :numbered:
  :source-highlighter: pygments
  
negative.code: [source, clojure]
  ----
  (let [c (chan 1 (comp
                   (map deref)
                   (mapcat identity)))
        res (sca/fetch *ctx* "select * from foo order by n" {:chan c})]
    (println "Result1: " (<!! res))
  