An attempt at a protocol that can imply the present of specific cases

FoundationErrorWrapper.swift

import Foundation

public protocol FoundationErrorWrapper: ErrorProtocol {
    static func wrappingError(_ error: NSError) -> Self
}

enum SomeError: ErrorProtocol, FoundationErrorWrapper {
    case a
    case wrappingError(NSError)
}

enum SomeOtherError: ErrorProtocol, FoundationErrorWrapper {
    case b
    case wrappingError(NSError)
}