@ ProgramNode (location: (0...15))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...15))
    └── body: (length: 3)
        ├── @ RangeNode (location: (0...6))
        │   ├── left:
        │   │   @ IntegerNode (location: (0...1))
        │   │   └── flags: decimal
        │   ├── right:
        │   │   @ IntegerNode (location: (5...6))
        │   │   └── flags: decimal
        │   ├── operator_loc: (1...4) = "..."
        │   └── flags: exclude_end
        ├── @ RangeNode (location: (7...13))
        │   ├── left:
        │   │   @ CallNode (location: (7...8))
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── message_loc: (7...8) = "a"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   ├── block: ∅
        │   │   ├── flags: variable_call
        │   │   └── name: "a"
        │   ├── right:
        │   │   @ CallNode (location: (12...13))
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── message_loc: (12...13) = "b"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   ├── block: ∅
        │   │   ├── flags: variable_call
        │   │   └── name: "b"
        │   ├── operator_loc: (8...11) = "..."
        │   └── flags: exclude_end
        └── @ CallNode (location: (14...15))
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── message_loc: (14...15) = "c"
            ├── opening_loc: ∅
            ├── arguments: ∅
            ├── closing_loc: ∅
            ├── block: ∅
            ├── flags: variable_call
            └── name: "c"
