AをBに変換するCombine.Publisher拡張を作りたい

ConvertAtoB.swift

import UIKit
import Combine

struct A {
    let name: String
}

struct B {
    let text: String
}

protocol Convertable {
    associatedtype V
    var converted: V { get }

// or
//    associatedtype V
//    func converted() -> V
// or
//    func converted<V>() -> V
}

extension Publisher {
    func converted() -> Publishers.Map<Self, Self.Output.V> where Self.Output == Convertable {
        self.map { $0.converted }
    }
}

extension A: Convertable {
    var converted:  B {
        .init(text: self.name)
    }
  
// or
//    func converted() -> B {
//        .init(text: self.name)
//    }
}