Show error that results in wrapping abstract protocol with associated type requirements

TEParserProtocol2.swift

class DeserializerBox<D: JsonDeserializer> {
    let deserializer: D

    init(deserializer: D) {
        self.deserializer = deserializer
    }
}

class Session<P>: NetworkSession {
    typealias Payload = P
    let deserializer: DeserializerBox

    init(deserializer: DeserializerBox) {
        self.deserializer = deserializer
    }

    func get(url: URL, parameters: [String: String], onComplete: (Result<P, NetworkError>) -> Void) {

    }
}