title: How to get Intellij to auto import Spark SQL Functions
body: <p>When writing Spark Scala code in Intellij, I have to manually Spark SQL functions, like <code>col</code> or <code>lit</code> (<a href="https://spark.apache.org/docs/2.0.2/api/java/org/apache/spark/sql/functions.html" rel="nofollow noreferrer">https://spark.apache.org/docs/2.0.2/api/java/org/apache/spark/sql/functions.html</a>). Is there a way to get IntelliJ to auto import them for me? All other Spark API's (Datasets, Rows, etc) work as expected.</p>