From d71d0df377c803a5db318bd3e18ae5bf3d2d1e35 Mon Sep 17 00:00:00 2001
From: xtqqczze <xtqqczze@gmail.com>
Date: Mon, 9 Nov 2020 18:01:59 +0000
Subject: [PATCH 1/2] Enable nullable:
 System.Management.Automation.Internal.IValidateSetValuesGenerator

---
 src/System.Management.Automation/engine/Attributes.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/System.Management.Automation/engine/Attributes.cs b/src/System.Management.Automation/engine/Attributes.cs
index cbe4a2b0dd7..74369d64218 100644
--- a/src/System.Management.Automation/engine/Attributes.cs
+++ b/src/System.Management.Automation/engine/Attributes.cs
@@ -1731,6 +1731,7 @@ public ValidateSetAttribute(Type valuesGeneratorType)
     /// <summary>
     /// Allows dynamically generate set of values for <see cref="ValidateSetAttribute"/>
     /// </summary>
+#nullable enable
     public interface IValidateSetValuesGenerator
     {
         /// <summary>
@@ -1738,6 +1739,7 @@ public interface IValidateSetValuesGenerator
         /// </summary>
         string[] GetValidValues();
     }
+#nullable restore
 
     /// <summary>
     /// Validates that each parameter argument is Trusted data.

From 4c2706cb122ee91a184be5c0d21d9e13c9ee9786 Mon Sep 17 00:00:00 2001
From: xtqqczze <xtqqczze@gmail.com>
Date: Wed, 11 Nov 2020 01:58:48 +0000
Subject: [PATCH 2/2] Add documentation comment for return type

Address @iSazonov review
---
 src/System.Management.Automation/engine/Attributes.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/System.Management.Automation/engine/Attributes.cs b/src/System.Management.Automation/engine/Attributes.cs
index 74369d64218..347eb4c7cd5 100644
--- a/src/System.Management.Automation/engine/Attributes.cs
+++ b/src/System.Management.Automation/engine/Attributes.cs
@@ -1737,6 +1737,7 @@ public interface IValidateSetValuesGenerator
         /// <summary>
         /// Gets valid values.
         /// </summary>
+        /// <returns>A non-null array of non-null strings.</returns>
         string[] GetValidValues();
     }
 #nullable restore