fix

com.unity.uiwidgets/Runtime/widgets/basic.cs

             ImageRepeat repeat = ImageRepeat.noRepeat,
             Rect centerSlice = null,
             bool invertColors = false,
-            FilterMode filterMode = FilterMode.Bilinear ,
-
         ) : base(key) {
             this.image = image;
             this.width = width;

com.unity.uiwidgets/Runtime/widgets/texture.cs

 
         public Texture( Key key = null, int? textureId = null) : base(key: key) {
             D.assert(textureId != null);
-            if (textureId != null) {
-                this.textureId = textureId.Value;
-            }
+            this.textureId = textureId.Value;
         }
 
         public readonly int textureId;