@ ProgramNode (location: (1,0)-(1,12))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,12))
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,12))
            ├── flags: ignore_visibility
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── name: :m
            ├── message_loc: (1,0)-(1,1) = "m"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (1,2)-(1,12))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ InterpolatedStringNode (location: (1,2)-(1,12))
            │           ├── flags: ∅
            │           ├── opening_loc: (1,2)-(1,3) = "\""
            │           ├── parts: (length: 2)
            │           │   ├── @ EmbeddedStatementsNode (location: (1,3)-(1,6))
            │           │   │   ├── opening_loc: (1,3)-(1,5) = "\#{"
            │           │   │   ├── statements: ∅
            │           │   │   └── closing_loc: (1,5)-(1,6) = "}"
            │           │   └── @ EmbeddedStatementsNode (location: (1,6)-(1,11))
            │           │       ├── opening_loc: (1,6)-(1,8) = "\#{"
            │           │       ├── statements:
            │           │       │   @ StatementsNode (location: (1,8)-(1,10))
            │           │       │   └── body: (length: 1)
            │           │       │       └── @ ParenthesesNode (location: (1,8)-(1,10))
            │           │       │           ├── body: ∅
            │           │       │           ├── opening_loc: (1,8)-(1,9) = "("
            │           │       │           └── closing_loc: (1,9)-(1,10) = ")"
            │           │       └── closing_loc: (1,10)-(1,11) = "}"
            │           └── closing_loc: (1,11)-(1,12) = "\""
            ├── closing_loc: ∅
            └── block: ∅