title: get curren value of box.sequence in tarantool
body: <p>I got sequence current value <code>3</code></p>
  
  <pre><code>localhost:3401&gt; box.sequence.S:next()
  ---
  - 3
  ...
  </code></pre>
  
  <p>I can't find current value in the object</p>
  
  <pre><code>localhost:3401&gt; box.sequence.S
  ---
  - step: 1
    id: 1
    min: 1
    cache: 0
    uid: 1
    max: 9223372036854775807
    cycle: false
    name: S
    start: 1
  ...
  </code></pre>
  
  <p>How to get current value? Didn't find any way in documentation. </p>