public static void ReportAmbiguousNamespaceOrType(this ICollection<Diagnostic> diagnostics, QualifiedDeclarationNameSyntax syntax, IReadOnlyList<Symbol> candidates) { var symbol1 = candidates[0]; var symbol2 = candidates[1]; diagnostics.Report(syntax.GetTextSpanSafe(), DiagnosticId.AmbiguousNamespaceOrType, syntax.ToStringIgnoringMacroReferences(), symbol1.Name, symbol2.Name); }