@ DocumentNode (location: (1:0)-(1:33))
└── children: (1 item)
    └── @ HTMLElementNode (location: (1:0)-(1:33))
        ├── open_tag:
        │   └── @ HTMLOpenTagNode (location: (1:0)-(1:4))
        │       ├── tag_opening: "<" (location: (1:0)-(1:1))
        │       ├── tag_name: "h1" (location: (1:1)-(1:3))
        │       ├── tag_closing: ">" (location: (1:3)-(1:4))
        │       ├── children: []
        │       └── is_void: false
        │
        ├── tag_name: "h1" (location: (1:1)-(1:3))
        ├── body: (3 items)
        │   ├── @ HTMLTextNode (location: (1:4)-(1:10))
        │   │   └── content: "Hello "
        │   │
        │   ├── @ ERBContentNode (location: (1:10)-(1:22))
        │   │   ├── tag_opening: "<%=" (location: (1:10)-(1:13))
        │   │   ├── content: " World " (location: (1:13)-(1:20))
        │   │   ├── tag_closing: "%>" (location: (1:20)-(1:22))
        │   │   ├── parsed: true
        │   │   └── valid: true
        │   │
        │   └── @ HTMLTextNode (location: (1:22)-(1:28))
        │       └── content: " Hello"
        │
        ├── close_tag:
        │   └── @ HTMLCloseTagNode (location: (1:28)-(1:33))
        │       ├── tag_opening: "</" (location: (1:28)-(1:30))
        │       ├── tag_name: "h1" (location: (1:30)-(1:32))
        │       └── tag_closing: ">" (location: (1:32)-(1:33))
        │
        └── is_void: false