From 939aa565b5e8dc2c4d51c5ef25f33ded70ed5bd8 Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Wed, 17 Oct 2018 10:37:32 +0200
Subject: [PATCH] Change ol/control/ScaleLine getUnits return type

Remove `undefined` from the return type: the default value is 'metric'
---
 src/ol/control/ScaleLine.js | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index 2e8b163136..1aacaa20f4 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -121,22 +121,19 @@ class ScaleLine extends Control {
       this, getChangeEventType(UNITS_PROP),
       this.handleUnitsChanged_, this);
 
-    this.setUnits(/** @type {Units} */ (options.units) ||
-        Units.METRIC);
+    this.setUnits(/** @type {Units} */ (options.units) || Units.METRIC);
 
   }
 
   /**
    * Return the units to use in the scale line.
-   * @return {Units|undefined} The units
+   * @return {Units} The units
    * to use in the scale line.
    * @observable
    * @api
    */
   getUnits() {
-    return (
-      /** @type {Units|undefined} */ (this.get(UNITS_PROP))
-    );
+    return this.get(UNITS_PROP);
   }
 
   /**