@ ProgramNode (location: (1,0)-(1,11))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,11))
    └── body: (length: 1)
        └── @ InterpolatedSymbolNode (location: (1,0)-(1,11))
            ├── opening_loc: (1,0)-(1,2) = ":\""
            ├── parts: (length: 1)
            │   └── @ EmbeddedStatementsNode (location: (1,2)-(1,10))
            │       ├── opening_loc: (1,2)-(1,4) = "\#{"
            │       ├── statements:
            │       │   @ StatementsNode (location: (1,4)-(1,9))
            │       │   └── body: (length: 1)
            │       │       └── @ CallNode (location: (1,4)-(1,9))
            │       │           ├── flags: variable_call, ignore_visibility
            │       │           ├── receiver: ∅
            │       │           ├── call_operator_loc: ∅
            │       │           ├── name: :field
            │       │           ├── message_loc: (1,4)-(1,9) = "field"
            │       │           ├── opening_loc: ∅
            │       │           ├── arguments: ∅
            │       │           ├── closing_loc: ∅
            │       │           └── block: ∅
            │       └── closing_loc: (1,9)-(1,10) = "}"
            └── closing_loc: (1,10)-(1,11) = "\""