Expose OverrideButton.

src/SMAPI/Framework/ModHelpers/InputHelper.cs

@@ -85,4 +85,10 @@ internal class InputHelper : BaseHelper, IInputHelper
     {
         return this.CurrentInputState().GetState(button);
     }
+
+    /// <inheritdoc />
+    public void OverrideButton(SButton button, bool setDown)
+    {
+        this.CurrentInputState().OverrideButton(button, setDown);
+    }
 }

src/SMAPI/IInputHelper.cs

@@ -30,4 +30,9 @@ public interface IInputHelper : IModLinked
     /// <summary>Get the state of a button.</summary>
     /// <param name="button">The button to check.</param>
     SButtonState GetState(SButton button);
+
+    /// <summary>Override the state of a button.</summary>
+    /// <param name="button">The button to override.</param>
+    /// <param name="setDown">A new button state.</param>
+    void OverrideButton(SButton button, bool setDown);
 }