EFLinqAnalyzer.EFUsageContext.GetClassInfo C# (CSharp) Метод

        public EFCodeFirstClassInfo GetClassInfo(ITypeSymbol typeArg) => _clsInfo.ContainsKey(typeArg) ? _clsInfo[typeArg] : null;

        private static void ValidateNavigationPropertyAccess(InvocationExpressionSyntax node, SyntaxNodeAnalysisContext context, EFUsageContext efContext, bool treatAsWarning, string memberName, EFCodeFirstClassInfo cls)
        {
            if (node.ArgumentList.Arguments.Count == 1 &&
                node.ArgumentList.Arguments[0].Expression.Kind() != SyntaxKind.SimpleLambdaExpression)
            {
                if (node.ArgumentList.Arguments[0].Expression.Kind() == SyntaxKind.IdentifierName)
                {
                    //Follow the identifier back to its assignment
                    var si = context.SemanticModel.GetSymbolInfo(node.ArgumentList.Arguments[0].Expression);
                    if (si.Symbol?.Kind == SymbolKind.Local)
                    {
                        var type = si.Symbol?.TryGetType() as INamedTypeSymbol;

                        //The variable inside our LINQ sub-operator is a Func<T, bool> where T
                        //is a known entity type
                        if (type != null &&
                            type.MetadataName == $"{EFSpecialIdentifiers.Func}`2" &&
                            efContext.GetClassInfo(type.TypeArguments[0]) != null &&
                            type.TypeArguments[1].MetadataName == EFSpecialIdentifiers.Boolean)
                        {
                            //TODO: Code fix candidate
                            //
                            //In such a case, inject an .AsQueryable() before the LINQ operator call
                            //and add using System.Linq if required and convert the variable from Func<T, bool> to Expression<Func<T, bool>>
                            var diagnostic = Diagnostic.Create(treatAsWarning ? DiagnosticCodes.EFLINQ009 : DiagnosticCodes.EFLINQ008, node.ArgumentList.Arguments[0].Expression.GetLocation(), memberName, cls.Name);
                            context.ReportDiagnostic(diagnostic);
                        }
                    }
                }
            }
        }