DateDurationPicker.swift

struct DateDurationPicker: UIViewRepresentable {
  // …
  func makeCoordinator() -> Coordinator {
    return Coordinator(selection: selection, values: values, units: units)
  }
    
  final class Coordinator: NSObject, UIPickerViewDataSource, UIPickerViewDelegate {
    let selection: Binding<DateDuration>
    let values: [Int]
    let units: [DateDuration.Unit]
        
    init(selection: Binding<DateDuration>, values: [Int], units: [DateDuration.Unit]) {
      self.selection = selection
      self.values = values
      self.units = units
    }
    // …
  }
}