Source Generator only annotate method instead of class

        public void OnVisitSyntaxNode(SyntaxNode syntaxNode)
        {
            switch (syntaxNode)
            {
                case ClassDeclarationSyntax classDeclarationSyntax when
                    classDeclarationSyntax.HasAttribute<TAttribute>():
                    //Process...
                    break;
                case MethodDeclarationSyntax methodDeclarationSyntax when
                    methodDeclarationSyntax.HasAttribute<TAttribute>():
                    //Process...
                    break;
            }
        }