@ ProgramNode (location: (1,0)-(1,2)) ├── locals: [] └── statements: @ StatementsNode (location: (1,0)-(1,2)) └── body: (length: 1) └── @ CallNode (location: (1,0)-(1,2)) ├── flags: ∅ ├── receiver: │ @ IntegerNode (location: (1,1)-(1,2)) │ ├── flags: decimal │ └── value: 1 ├── call_operator_loc: ∅ ├── name: :! ├── message_loc: (1,0)-(1,1) = "!" ├── opening_loc: ∅ ├── arguments: ∅ ├── closing_loc: ∅ └── block: ∅