namespace Microsoft.Extensions.Options
{
    public class OptionsBuilder<TOptions>
        where TOptions, class
    {
        public virtual OptionsBuilder<TOptions!>! Validate<TDep1, TDep2, TDep3>(Func<TOptions!, TDep1, TDep2, TDep3, bool>! validation)
            where TDep1, notnull
            where TDep2, notnull
            where TDep3, notnull;
    }
}