public override object Clone()
{
var newMixin = (ShaderMixinSource)MemberwiseClone();
newMixin.Compositions = Compositions == null ? null : ToSortedList(Compositions.Select(x => new KeyValuePair<string, ShaderSource>(x.Key, (ShaderSource)x.Value.Clone())));
newMixin.Mixins = Mixins == null ? null : Mixins.Select(x => (ShaderClassCode)x.Clone()).ToList();
newMixin.Macros = Macros == null ? null : new List<ShaderMacro>(Macros.ToArray());
return newMixin;
}