Add IEquatable on Key.

Yuncong Zhang · Yuncong Zhang · commit b93f213d6606 · 2019-05-08T13:10:30.000+08:00
diff --git a/Runtime/foundation/key.cs b/Runtime/foundation/key.cs
@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 
 namespace Unity.UIWidgets.foundation {
-    public abstract class Key {
+    public abstract class Key : IEquatable<Key> {
         protected Key() {
         }
 

Original file line number	Diff line number	Diff line change
`@@ -2,7 +2,7 @@`
`2`	`2`	`using System.Collections.Generic;`
`3`	`3`
`4`	`4`	`namespace Unity.UIWidgets.foundation {`
`5`		`- public abstract class Key {`
	`5`	`+ public abstract class Key : IEquatable<Key> {`
`6`	`6`	`protected Key() {`
`7`	`7`	`}`
`8`	`8`