@ DocumentNode (location: (1:0)-(5:0))
└── children: (2 items)
    ├── @ ERBContentNode (location: (1:0)-(4:2))
    │   ├── tag_opening: "<%" (location: (1:0)-(1:2))
    │   ├── content: "
    │     x = 1
    │     y = 2
    │   " (location: (1:2)-(4:0))
    │   ├── tag_closing: "%>" (location: (4:0)-(4:2))
    │   ├── parsed: true
    │   └── valid: true
    │
    └── @ HTMLTextNode (location: (4:2)-(5:0))
        └── content: "\n"