AbstractBuilder.swift

open class Builder<Context> {
    
    public init() {  }
    
    open func build(_ context: Context) -> UIViewController? {
        return nil
    }
}

AbstractFactory.swift

public protocol AbstractFactory {
    
    associatedtype Context
    
    var context: Context { get }
    
    func make(from builder: Builder<Context>) -> UIViewController?
    
    func getBuilder(from builderContainer: BuilderContainer) -> Builder<Context>?
}

public extension AbstractFactory {
    
    func make(from builder: Builder<Context>) -> UIViewController? {
        return builder.build(self.context)
    }
  
    func getBuilder(from container: BuilderContainer) -> Builder<Context>? {
        return container.getBuilder(Context.self)
    }
}

BuilderContainer.swift

public protocol BuilderContainer {
    
    func getBuilder<Context>(_ contextType: Context.Type) -> Builder<Context>?
}