title: Glob Sync Pattern on multiple directories
body: <p>I am trying to achieve a <code>glob</code> sync pattern that allows me to meet the following criteria, but unfortunately, im having a hard time working out why the pattern isn't working.</p>
  
  <p><strong>Glob Pattern</strong></p>
  
  <p><code>glob.sync("./src/handlebar/{a, b, c, d}/**/*.hbs")</code></p>
  
  <p><strong>File Path Patterns</strong></p>
  
  <pre><code>src/handlebar/b/a/header.hbs
  src/handlebar/b/header.hbs
  src/handlebar/a/head.hbs [MATCH]
  src/handlebar/a/foot.hbs [MATCH]
  src/handlebar/c/a/something.hbs
  src/handlebar/d/a/button.hbs
  </code></pre>
  
  <p>What am i doing wrong?</p>