SwiftUI How to instantiate PreviewProvider when View requires @Binding in initializer

With SwiftUI (Xcode 11.1), I've got some Views set up with 2-way bindings (using @Binding). Two-way updating works great.

However, how can I instantiate the view from the PreviewProvider?

For example:

struct AddProjectView: View {

    @Binding public var showModal: Bool

    var body: some View {

        return VStack {
            Text("Add Project View")
            Button("Dismiss") {
                self.showModal = false
            }
        }
    }
}

I can't do this, because "true" is not a Binding:

struct AddProjectView_Previews: PreviewProvider {
    static var previews: some View {
        AddProjectView(showModal: true)
    }
}

And I can't do this because "Property wrappers are not yet supported on local properties":

struct AddProjectView_Previews: PreviewProvider {
    static var previews: some View {
        @Binding var show = true
        return AddProjectView(showModal: $show)
    }
}

How do we do this?

Thanks!!

.constant is meant exactly for that:

/// Creates a binding with an immutable value.

struct AddProjectView: View {
    @Binding public var showModal: Bool
    var body: some View {
        return VStack {
            Text("Add Project View")
            Button("Dismiss") {
                self.showModal = false
            }
        }
    }
}

struct AddProjectView_Previews: PreviewProvider {
    static var previews: some View {
        AddProjectView(showModal: .constant(true))
    }
}