title: Package is not visible error
body: <p>I was trying to use joptsimple package in my project but I get following error:</p>
  
  <pre><code>Error:(4, 20) java: package jdk.internal.joptsimple is not visible
    (package jdk.internal.joptsimple is declared in module jdk.internal.opt, which does not export it to the unnamed module)
  </code></pre>
  
  <p>Any ideas what should I do with it?</p>