namespace System.Text.RegularExpressions
{
    [EditorBrowsable(EditorBrowsableState.Never)]
    public abstract class RegexRunner
    {
        [Obsolete("This API supports obsolete mechanisms for Regex extensibility. It is not supported.", DiagnosticId = "SYSLIB0052", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        protected internal Match? Scan(Regex! regex, string! text, int textbeg, int textend, int textstart, int prevlen, bool quick, TimeSpan timeout);
    }
}