namespace Foundation
{
    [Register("NSMutableString", true)]
    public class NSMutableString : NSString, INSCoding, INativeObject, IDisposable
    {
        [BindingImpl(BindingImplOptions.GeneratedCode | BindingImplOptions.Optimizable)]
        [Export("appendString:")]
        public virtual void Append(NSString! str);
    }
}