RazorDocument - [0..20)::20 - [@custom -Some_Member]
    MarkupBlock - [0..20)::20
        MarkupTextLiteral - [0..0)::0 - [] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Marker;[];
        CSharpCodeBlock - [0..8)::8
            RazorDirective - [0..8)::8 - Directive:{custom;SingleLine;Unrestricted} [RZ1015(8:0,8 [1] )]
                CSharpTransition - [0..1)::1 - Gen<None> - SpanEditHandler;Accepts:None
                    Transition;[@];
                RazorDirectiveBody - [1..8)::7
                    RazorMetaCode - [1..7)::6 - Gen<None> - SpanEditHandler;Accepts:None
                        Identifier;[custom];
                    CSharpCodeBlock - [7..8)::1
                        CSharpStatementLiteral - [7..8)::1 - [ ] - Gen<None> - SpanEditHandler;Accepts:Whitespace
                            Whitespace;[ ];
        MarkupTextLiteral - [8..20)::12 - [-Some_Member] - Gen<Markup> - SpanEditHandler;Accepts:Any
            Text;[-Some_Member];
