Which way is right for "Strong Reference Cycles for Closures" - swift

Question

In Apple Swift Document
A strong reference cycle can also occur if you assign a closure to a property of a class instance, and the body of that closure captures the instance.
The reCreactJavascriptTool is a property of a Controller which contains a WKWebview. The main work of the reCreactJavascriptTool is reacting with the HTML file.
private lazy var reCreactJavascriptTool: JavascriptTool = {
var reCreactJSTool = JavascriptTool()
reCreactJSTool.reJSBlock = { [unowned self] (module: String?, hareModel: HareModel?) in
if module == "hare" {
self.XXXcode
}
}
reCreactJSTool.bBlock = { [unowned self] (btnId: String?) in
self.lefckId = btnId;
self.confS()
}
reCreactJSTool.reBlock = { [unowned self] in
if (self.recordUrl?.absoluteString.count)! > 0 {
XXXXXXcode
}else {
XXXXXXcode
XXXXXXcode
}
}
return reCreactJSTool
}()
If I type the code like this :
private lazy var reCreactJavascriptTool: JavascriptTool = { [unowned self] in
// And remove all the " [unowned self] " in all Blocks
reCreactJSTool.reJSBlock = { (module: String?, hareModel: HareModel?) in
if module == "hare" {
self.XXXcode
}
}
reCreactJSTool.bBlock = { (btnId: String?) in
self.lefckId = btnId;
self.confS()
}
reCreactJSTool.reBlock = { in
if (self.recordUrl?.absoluteString.count)! > 0 {
XXXXXXcode
}else {
XXXXXXcode
XXXXXXcode
}
}
}
I don't know which code snippet is right.