NSManagedObjectContext+old_performAndWait.swift

import CoreData

extension NSManagedObjectContext {
  @available(macOS, deprecated: 12, renamed: "performAndWait(_:)")
  @available(iOS, deprecated: 15.0, renamed: "performAndWait(_:)")
  func old_performAndWait<T>(_ block: () throws -> T) rethrows -> T {
    try withoutActuallyEscaping(block) { _block in
      var result: Result<T, Error>?

      performAndWait {
        do {
          result = try .success(_block())
        } catch {
          result = .failure(error)
        }
      }

      return try result.unsafelyUnwrapped.get()
    }
  }
}