Document - 
    NamespaceDeclaration -  - Test
        UsingDirective - (3:1,1 [14] ) - System
        UsingDirective - (18:2,1 [34] ) - System.Collections.Generic
        UsingDirective - (53:3,1 [19] ) - System.Linq
        UsingDirective - (73:4,1 [30] ) - System.Threading.Tasks
        UsingDirective - (104:5,1 [39] ) - Microsoft.AspNetCore.Components
        ClassDeclaration -  - public partial - TestComponent - Microsoft.AspNetCore.Components.ComponentBase - 
            MethodDeclaration -  - protected override - void - BuildRenderTree
                HtmlContent - (26:1,0 [6] x:\dir\subdir\Test\TestComponent.cshtml)
                    LazyIntermediateToken - (26:1,0 [6] x:\dir\subdir\Test\TestComponent.cshtml) - Html - \n    
                MarkupElement - (32:2,4 [48] x:\dir\subdir\Test\TestComponent.cshtml) - elem
                    HtmlAttribute - (37:2,9 [10] x:\dir\subdir\Test\TestComponent.cshtml) -  attr= - 
                        CSharpExpressionAttributeValue - (43:2,15 [4] x:\dir\subdir\Test\TestComponent.cshtml) - 
                            LazyIntermediateToken - (44:2,16 [3] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - Foo
                    MarkupBlock -  - \n        <child></child>\n    
                MarkupBlock -  - \n\n\n
            CSharpCode - (95:6,11 [29] x:\dir\subdir\Test\TestComponent.cshtml)
                LazyIntermediateToken - (95:6,11 [29] x:\dir\subdir\Test\TestComponent.cshtml) - CSharp - \n        int Foo = 18;\n    
