namespace Microsoft.AspNetCore.Authentication
{
    public abstract class AuthenticationHandler<TOptions> : IAuthenticationHandler
        where TOptions, new(), AuthenticationSchemeOptions!
    {
        [Obsolete("ISystemClock is obsolete, use TimeProvider on AuthenticationSchemeOptions instead.")]
        protected AuthenticationHandler(IOptionsMonitor<TOptions!>! options, ILoggerFactory! logger, UrlEncoder! encoder, ISystemClock! clock);
    }
}