title: Custom transform not getting applied in wrangler in Google Cloud Data Fusion
body: <p>I am trying to following custom transform in a wrangler in Google Cloud Data Fusion.</p>
  <pre><code>set-column column (parse-as-json :column 2 ) ? column =^ &quot;[&quot; : (parse-as-json :column 1 )
  </code></pre>
  <p>I want to parse column as JSON to a depth of 2 if it is an array, which means if it starts with a square bracket ([), otherwise to a depth of 1. I am not sure if the colon in <code>parse-as-json</code> directive is causing issue here.</p>
  <p>If I change it to following, it works fine:-</p>
  <pre><code>set-column column 'a' ? column =^ &quot;[&quot; : 'b'
  </code></pre>
  <p>I have also tried escaping the colon in <code>parse-as-json</code> directive with a backslash,still didn't work. What am I doing wrong here? Please suggest.</p>