title: How to import RxSwift in Playground of xcode?
body: <p>I am trying to import rxswift in xcode playground by this: </p>
  
  <pre><code>gem install cocoapods-playgrounds
  </code></pre>
  
  <p>and after that</p>
  
  <pre><code>pod playgrounds RxSwift
  </code></pre>
  
  <p>But it is not happening. How to do it?</p>