private IEnumerable <Diagnostic> AnalyzeParameter(IParameterSymbol symbol, string commentXml, IReadOnlyList <string> phrase)
        {
            var comment = symbol.GetComment(commentXml);

            if (phrase.Any(_ => _ == comment))
            {
                return(Enumerable.Empty <Diagnostic>());
            }

            return(new[] { Issue(symbol, Constants.XmlTag.Param, phrase[0]) });
        }