@ DocumentNode (location: (1:0)-(2:0))
└── children: (1 item)
    └── @ ERBYieldNode (location: (1:0)-(2:0))
        ├── tag_opening: "<%=" (location: (1:0)-(1:3))
        ├── content: " yield :symbol " (location: (1:3)-(1:18))
        └── tag_closing: "%>" (location: (1:18)-(1:20))