title: Reference uploaded JAR library
body: <p>I've billed set of support function into <code>helper.jar</code> library and imported to Databricks cluster. The jar is installed on the cluster, but I'm not able to reference the functions in the library.</p>
  
  <p>The jar import has been tested, cluster restarted and the jar can be referenced in InelliJ where it was developed as Azure Spark/HDInsight project.</p>
  
  <pre><code>//next line generates error value helper is not a member of org.apache.spark.sql.SparkSession
  import helper 
  
  //nex line generates error: not found: value fn_conversion 
  display(df.withColumn("RevenueConstantUSD", fn_conversion($"Revenue")) 
  </code></pre>
  
  <p>I'd expect the <code>helper</code> function would be visible after library deployment or possibly after adding the <code>import</code> command.</p>
  
  <p><em>Edit: added information about IntelliJ project type</em></p>