@ ProgramNode (location: (1,0)-(1,9))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,9))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ ArrayNode (location: (1,0)-(1,9))
            ├── flags: newline
            ├── elements: (length: 1)
            │   └── @ InterpolatedStringNode (location: (1,3)-(1,8))
            │       ├── flags: ∅
            │       ├── opening_loc: ∅
            │       ├── parts: (length: 2)
            │       │   ├── @ EmbeddedStatementsNode (location: (1,3)-(1,7))
            │       │   │   ├── flags: ∅
            │       │   │   ├── opening_loc: (1,3)-(1,5) = "\#{"
            │       │   │   ├── statements:
            │       │   │   │   @ StatementsNode (location: (1,5)-(1,6))
            │       │   │   │   ├── flags: ∅
            │       │   │   │   └── body: (length: 1)
            │       │   │   │       └── @ IntegerNode (location: (1,5)-(1,6))
            │       │   │   │           ├── flags: static_literal, decimal
            │       │   │   │           └── value: 1
            │       │   │   └── closing_loc: (1,6)-(1,7) = "}"
            │       │   └── @ StringNode (location: (1,7)-(1,8))
            │       │       ├── flags: static_literal, frozen
            │       │       ├── opening_loc: ∅
            │       │       ├── content_loc: (1,7)-(1,8) = "b"
            │       │       ├── closing_loc: ∅
            │       │       └── unescaped: "b"
            │       └── closing_loc: ∅
            ├── opening_loc: (1,0)-(1,3) = "%W("
            └── closing_loc: (1,8)-(1,9) = ")"
