title: 'Bool' is not convertible to 'Binding<Bool>' in SwiftUI
body: <p>I have a <code>SwiftUI</code> native Watch app I Am working on. I have a <code>Combine</code> based class that allows me to store `\userDefaults, one of which is a simple toggle.</p>
  
  <pre><code>import SwiftUI  
  import Foundation  
  import Combine  
  
  
  class MeetingSetup: BindableObject {  
  
      let willChange = PassthroughSubject&lt;Void, Never&gt;()  
  
      var twitterEnabled: Bool = false {  
          didSet {  
              willChange.send()  
          }  
      }  
  
      init() {  
          let prefs:UserDefaults = UserDefaults(suiteName: "group.com.appname")!  
          twitterEnabled = prefs.bool(forKey: "keyTwitterEnabledBool")  
      }  
  } 
  </code></pre>
  
  <p>In the <code>SwiftUI</code> I am getting the error messages that <code>Bool</code> is not convertible to <code>Binding&lt;Bool&gt;</code></p>
  
  <pre><code>import SwiftUI  
  import Combine  
  
  struct SetupView : View {  
  
      @ObjectBinding var meetingSetup: MeetingSetup = delegate.meetingSetup  
  
      var body: some View {  
  
                  HStack{  
                      Toggle(isOn: self.meetingSetup.twitterEnabled){  // &lt;== 'Bool' in not convertible to 'Binding&lt;Bool&gt;'  
                          Text("Twitter")  
                      }  
      }  
  } 
  </code></pre>
  
  <p>I don't understand why this is getting the message since the code is <code>@ObjectBinding</code>, should it not be <code>Binding&lt;Bool&gt;</code> by definition?  If not how do I address this correctly??</p>