[BUG] [SWIFT] Stored properties cannot be marked potentially unavailable with '@available' with 7.0.0

[barcister]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

Upon updating our projects to 7.0.0 we've noticed a build error in Xcode in URLSessionImplementations.swift on line 55:
@available(*, unavailable, message: "Please override execute() method to intercept and handle errors like authorization or retry the request. Check the Wiki for more info. https://github.com/OpenAPITools/openapi-generator/wiki/FAQ#how-do-i-implement-bearer-token-authentication-with-urlsession-on-the-swift-api-client")

openapi-generator version

7.0.0 (works fine on 6.6.0)

Steps to reproduce

Generate a base client to Swift using 7.0.0 version and try to run the project.

Xcode version: 14.3.1 and 15.0

Suggest a fix

As an interim fix, we created our own moustache file without the available check and that resolved our build issues.

[wing328]

can you please submit a PR with the patched mustache template and we'll start from there? thanks.

[barcister]

just opened the PR:
Link