Validation that all properties were assigned

[POnakS]

Hello, I think this library is good candidate for creating complex objects, i.e.

public ClassA
{  
    public required int Prop1 {get; init;}
    ...
    public required int PropN {get; init;}
}

However using this removes my compile-time safety, i.e. after adding PropN+1 existing builders will just assign default (0 or null) to it, rather than failing at compile time that PropN is not set.

I understand that doing such check at compile time may be not possible, however it would be nice to at least have possibility to do runtime check.

Proposed api:

    [BuilderFor(typeof(ClassA), Strict = true)]
    public partial class ClassABuilder
    {
    }

Then calling .Build() throws if WithPopX was called for each property, if no then it fails with exception.