From 6e33a058696f8a6670c7718ef8d59084b6ed4553 Mon Sep 17 00:00:00 2001
From: Denis Kurochkin <dkurochkin@smartling.com>
Date: Tue, 8 Sep 2020 11:37:55 +0300
Subject: [PATCH] columns in DataExtensions are always pre-initialized with
 `new ArrayList<>`

---
 src/main/java/com/exacttarget/fuelsdk/ETDataExtension.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/com/exacttarget/fuelsdk/ETDataExtension.java b/src/main/java/com/exacttarget/fuelsdk/ETDataExtension.java
index 6bed773f..d010bafa 100644
--- a/src/main/java/com/exacttarget/fuelsdk/ETDataExtension.java
+++ b/src/main/java/com/exacttarget/fuelsdk/ETDataExtension.java
@@ -361,7 +361,7 @@ public void addColumn(ETDataExtensionColumn column) {
     public List<String> getColumnNames()
         throws ETSdkException
     {
-        if (columns == null) {
+        if (columns == null || columns.isEmpty()) {
             columns = retrieveColumns();
         }
         return getColumnNames(columns);