Swift protocol questions

ParserNode.swift

import Foundation
import Fuzi
import Swinject

// option one 
// - fails because of "Self or associated type errors"

public protocol ParserNode {
    typealias GenerateType
    
    // parses xml nodes onto attributes defined on the ParserNode
    func parseXML(nodes: Container, elem: XMLElement)
    func generate(containers: [String: Container], options: [String: Any]) -> MDLType
    
    // i'm getting errors here
    func copy() -> ParserNode
}

// option two 
// - it works, but I'm hesitant because of Generic-only constraints on ParserNode protocol

public protocol ParserNode2 {
    typealias NodeType
    typealias GenerateType
    
    func parseXML(nodes: Container, elem: XMLElement)
    func generate(containers: [String: Container], options: [String: Any]) -> MDLType
    func copy() -> NodeType
}