private static void LogSymbolLookupResults(Solution solution, Document document, InvocationExpressionSyntax beginXxxSyntax, int numMethodSymbolLookups)
 {
     Symbols.Info(
         "{0},{1},{2},{3}",
         solution.FilePath,
         document.FilePath,
         beginXxxSyntax.GetStartLineNumber(),
         numMethodSymbolLookups
     );
 }