title: Why does many golang project directly import from GitHub?
body: <p>I'm totally new to golang, and am wondering, why many golang projects write in their source code like this way:</p>
  
  <pre><code>import  "github.com/stretchr/testify/assert"
  </code></pre>
  
  <p>What if this <code>testify</code> moved to bitbucket?</p>
  
  <p>Why not download testify and <code>import testify</code>, like other languages?</p>