TwoWayBinding.swift

import Foundation
import RxSwift
import RxSwiftExt
import RxCocoa

extension Variable {
    func bidirectionalBind(with controlProperty: ControlProperty<Element>) -> Disposable {
        let bindingToControl = self
            .asDriver()
            .drive(controlProperty)
        
        let bindingToVariable = controlProperty
            .skipUntil(self.asObservable())
            .bindTo(self)
        
        return Disposables.create(bindingToControl, bindingToVariable)
    }
    
    func bidirectionalBind(with controlProperty: ControlProperty<Optional<Element>>) -> Disposable {
        let bindingToControl = self
            .asDriver()
            .drive(controlProperty)
        
        let bindingToVariable = controlProperty
            .skipUntil(self.asObservable())
            .unwrap()
            .bindTo(self)
        
        return Disposables.create(bindingToControl, bindingToVariable)
    }
}