fixed memory leak

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDSSample/ViewControllers/TestViewController.swift

@@ -34,6 +34,10 @@ extension Bindable {
 }
 
 class TextFieldBindingCell: UIView, Bindable {
+    deinit {
+        print("\(Self.self) deinit")
+    }
+    
     //bindable
     var model: User
     var subject: CurrentValueSubject<User, Never>?
@@ -77,19 +81,21 @@ class TextFieldBindingCell: UIView, Bindable {
         //add the logic
         let firstNameSubject = CurrentValueSubject<String, Never>(model.firstName)
         firstNameTextField.createBinding(with: firstNameSubject, storeIn: &subscriptions)
-        firstNameSubject.assign(to: \.model.firstName, on: self).store(in: &subscriptions)
+        firstNameSubject
-        firstNameSubject.sink {[weak self] value in
+            .sink {[weak self] value in
-            self?.send()
+                guard let self = self else { return }
+                self.model.firstName = value
+                self.send()
             }.store(in: &subscriptions)
         
         let lastNameSubject = CurrentValueSubject<String, Never>(model.lastName)
         lastNameTextField.createBinding(with: lastNameSubject, storeIn: &subscriptions)
-        lastNameSubject.assign(to: \.model.lastName, on: self).store(in: &subscriptions)
+        lastNameSubject
-        lastNameSubject.sink {[weak self] value in
+            .sink {[weak self] value in
                 guard let self = self else { return }
+                self.model.lastName = value
                 self.send()
             }.store(in: &subscriptions)
-
     }
 }
 
@@ -111,7 +117,11 @@ class TextFieldBindingCell: UIView, Bindable {
         view.backgroundColor = .white
         
         let subject = CurrentValueSubject<User, Never>(user)
-        subject.assign(to: \.user, on: self).store(in: &subscriptions)
+        subject
+            .sink{ [weak self] updatedModel in
+                self?.user = updatedModel
+            }
+            .store(in: &subscriptions)
         
         let nameTextField = TextFieldBindingCell(model: user)
         nameTextField.createBinding(with: subject, storeIn: &subscriptions)