Swift Extension with Namespace

ExtensionNamespace.swift

public protocol NamespaceWrappable {
    associatedtype T
    var ex: T { get }
    static var ex: T.Type { get }
}

extension NamespaceWrappable {
    public var ex: TypeWrapper<Self> {
        return TypeWrapper(value: self)
    }

    public static var ex: TypeWrapper<Self>.Type {
        return TypeWrapper.self
    }
}

public struct TypeWrapper<T> {
    var value: T
    init(value: T) {
        self.value = value
    }
}

extension String: NamespaceWrappable {}
public extension TypeWrapper where T == String {
    // extension code
}