public override bool Matches(object actual)
        {
            var enumerable = actual as IEnumerable <object>;

            if (enumerable == null)
            {
                return(Problem("An IEnumerable<object>", "Something else"));
            }
            foreach (var obj in enumerable)
            {
                if (MatchObject(_object, obj as ICmisObject))
                {
                    return(true);
                }
            }
            return(Problem("An IEnumerable with " + _object.ToString(), "An IEnumerable without it"));
        }