@ ProgramNode (location: (1,0)-(3,13))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(3,13))
    ├── flags: ∅
    └── body: (length: 2)
        ├── @ ArrayNode (location: (1,0)-(1,14))
        │   ├── flags: newline
        │   ├── elements: (length: 2)
        │   │   ├── @ SymbolNode (location: (1,3)-(1,6))
        │   │   │   ├── flags: static_literal, forced_us_ascii_encoding
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── value_loc: (1,3)-(1,6) = "foo"
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "foo"
        │   │   └── @ InterpolatedSymbolNode (location: (1,7)-(1,13))
        │   │       ├── flags: ∅
        │   │       ├── opening_loc: ∅
        │   │       ├── parts: (length: 1)
        │   │       │   └── @ EmbeddedStatementsNode (location: (1,7)-(1,13))
        │   │       │       ├── flags: ∅
        │   │       │       ├── opening_loc: (1,7)-(1,9) = "\#{"
        │   │       │       ├── statements:
        │   │       │       │   @ StatementsNode (location: (1,9)-(1,12))
        │   │       │       │   ├── flags: ∅
        │   │       │       │   └── body: (length: 1)
        │   │       │       │       └── @ CallNode (location: (1,9)-(1,12))
        │   │       │       │           ├── flags: variable_call, ignore_visibility
        │   │       │       │           ├── receiver: ∅
        │   │       │       │           ├── call_operator_loc: ∅
        │   │       │       │           ├── name: :bar
        │   │       │       │           ├── message_loc: (1,9)-(1,12) = "bar"
        │   │       │       │           ├── opening_loc: ∅
        │   │       │       │           ├── arguments: ∅
        │   │       │       │           ├── closing_loc: ∅
        │   │       │       │           └── block: ∅
        │   │       │       └── closing_loc: (1,12)-(1,13) = "}"
        │   │       └── closing_loc: ∅
        │   ├── opening_loc: (1,0)-(1,3) = "%I["
        │   └── closing_loc: (1,13)-(1,14) = "]"
        └── @ ArrayNode (location: (3,0)-(3,13))
            ├── flags: newline
            ├── elements: (length: 1)
            │   └── @ InterpolatedSymbolNode (location: (3,3)-(3,12))
            │       ├── flags: ∅
            │       ├── opening_loc: ∅
            │       ├── parts: (length: 2)
            │       │   ├── @ StringNode (location: (3,3)-(3,6))
            │       │   │   ├── flags: static_literal, frozen
            │       │   │   ├── opening_loc: ∅
            │       │   │   ├── content_loc: (3,3)-(3,6) = "foo"
            │       │   │   ├── closing_loc: ∅
            │       │   │   └── unescaped: "foo"
            │       │   └── @ EmbeddedStatementsNode (location: (3,6)-(3,12))
            │       │       ├── flags: ∅
            │       │       ├── opening_loc: (3,6)-(3,8) = "\#{"
            │       │       ├── statements:
            │       │       │   @ StatementsNode (location: (3,8)-(3,11))
            │       │       │   ├── flags: ∅
            │       │       │   └── body: (length: 1)
            │       │       │       └── @ CallNode (location: (3,8)-(3,11))
            │       │       │           ├── flags: variable_call, ignore_visibility
            │       │       │           ├── receiver: ∅
            │       │       │           ├── call_operator_loc: ∅
            │       │       │           ├── name: :bar
            │       │       │           ├── message_loc: (3,8)-(3,11) = "bar"
            │       │       │           ├── opening_loc: ∅
            │       │       │           ├── arguments: ∅
            │       │       │           ├── closing_loc: ∅
            │       │       │           └── block: ∅
            │       │       └── closing_loc: (3,11)-(3,12) = "}"
            │       └── closing_loc: ∅
            ├── opening_loc: (3,0)-(3,3) = "%I["
            └── closing_loc: (3,12)-(3,13) = "]"
