Dynamically hiding view in SwiftUI

I'm trying to conditionally hide a DatePicker in SwiftUI. However, I'm having any issue with mismatched types:

var datePicker = DatePicker($datePickerDate)
if self.showDatePicker {
    datePicker = datePicker.hidden()
}

In this case, datePicker is a DatePicker<EmptyView> type but datePicker.hidden() is a _ModifiedContent<DatePicker<EmptyView>, _HiddenModifier>. So I cannot assign datePicker.hidden() to datePicker. I've tried variations of this and can't seem to find a way that works. Any ideas?

UPDATE

You can unwrap the _ModifiedContent type to get the underlying type using it's content property. However, this doesn't solve the underlying issue. The content property appears to just be the original, unmodified date picker.

Rather than dynamically setting a variable and using it in my view, I found that I was able to hide or show the date picker this way:

struct ContentView : View {
    @State var showDatePicker = true
    @State var datePickerDate: Date = Date()

    var body: some View {
        VStack {
            if self.showDatePicker {
                DatePicker($datePickerDate)
            } else {
                DatePicker($datePickerDate).hidden()
            }
        }
    }
}

Or, optionally, not including the date picker instead of hiding it:

struct ContentView : View {
    @State var showDatePicker = true
    @State var datePickerDate: Date = Date()

    var body: some View {
        VStack {
            if self.showDatePicker {
                DatePicker($datePickerDate)
            }
        }
    }
}