From 2998749d0ea99249007d5218e05b7cb59fd54e8a Mon Sep 17 00:00:00 2001
From: Firenter <cedriccorthout@msn.com>
Date: Tue, 27 Dec 2016 11:10:02 +0100
Subject: [PATCH 1/2] Set some optional parameters to be actually optional

---
 openlayers/index.d.ts | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/openlayers/index.d.ts b/openlayers/index.d.ts
index e52407f450..a8a7559986 100644
--- a/openlayers/index.d.ts
+++ b/openlayers/index.d.ts
@@ -11695,7 +11695,7 @@ declare module olx {
             resolution: number;
             start?: number;
             duration?: number;
-            easing: ((t: number) => number);
+            easing?: ((t: number) => number);
         }
 
 
@@ -11709,7 +11709,7 @@ declare module olx {
             source: ol.Coordinate;
             start?: number;
             duration?: number;
-            easing: ((t: number) => number);
+            easing?: ((t: number) => number);
         }
 
 
@@ -11725,7 +11725,7 @@ declare module olx {
             anchor?: ol.Coordinate;
             start?: number;
             duration?: number;
-            easing: ((t: number) => number);
+            easing?: ((t: number) => number);
         }
 
 
@@ -11739,7 +11739,7 @@ declare module olx {
             resolution: number;
             start?: number;
             duration?: number;
-            easing: ((t: number) => number);
+            easing?: ((t: number) => number);
         }
 
 
@@ -11979,8 +11979,8 @@ declare module olx {
          *     decimals: (number|undefined)}}
          */
         interface WriteOptions {
-            dataProjection: ol.ProjectionLike;
-            featureProjection: ol.ProjectionLike;
+            dataProjection?: ol.ProjectionLike;
+            featureProjection?: ol.ProjectionLike;
             rightHanded?: boolean;
             decimals?: number;
         }

From d3d2a43d76c3931620ae14b070c85e831320b71c Mon Sep 17 00:00:00 2001
From: Firenter <cedriccorthout@msn.com>
Date: Wed, 28 Dec 2016 08:24:15 +0100
Subject: [PATCH 2/2] Updates based on comments received

---
 openlayers/index.d.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/openlayers/index.d.ts b/openlayers/index.d.ts
index a8a7559986..6f0a4b7b31 100644
--- a/openlayers/index.d.ts
+++ b/openlayers/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for OpenLayers v3.18.2
+// Type definitions for OpenLayers v3.20.0
 // Project: http://openlayers.org/
 // Definitions by: Olivier Sechet <https://github.com/osechet>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -11130,7 +11130,7 @@ declare module ol {
      * undefined.
      * @typedef {ol.proj.Projection|string|undefined} ol.ProjectionLike
      */
-    type ProjectionLike = (ol.proj.Projection | string);
+    type ProjectionLike = (ol.proj.Projection | string | undefined);
 
     /**
      * A function that takes an array of input data, performs some operation, and
@@ -11979,7 +11979,7 @@ declare module olx {
          *     decimals: (number|undefined)}}
          */
         interface WriteOptions {
-            dataProjection?: ol.ProjectionLike;
+            dataProjection: ol.ProjectionLike;
             featureProjection?: ol.ProjectionLike;
             rightHanded?: boolean;
             decimals?: number;