Declare the coerce and validate callback value parameter nullable

Proprietary

WPF calls a CoerceValueCallback and a ValidateValueCallback with a null value, so the value parameter should be declared object?. Only applies where nullable reference types are enabled, whether by a #nullable directive or by <Nullable> in the project.

OpenRewrite.Recipes.CSharp.CodeQuality.Wpf.MakeCallbackParameterNullable

mod run . --recipe=OpenRewrite.Recipes.CSharp.CodeQuality.Wpf.MakeCallbackParameterNullable

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.