public bool HasAnnotationForSymbol(ISymbol symbol, bool appliesToItem, Compilation compilation)
        {
            Guard.NotNull(symbol, nameof(symbol));

            return(source.Contains(symbol, appliesToItem));
        }
        public bool HasAnnotationForSymbol(ISymbol symbol, bool appliesToItem)
        {
            Guard.NotNull(symbol, "symbol");

            return(source.Contains(symbol, appliesToItem));
        }