@ ProgramNode (location: (0...15))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...15))
    └── body: (length: 1)
        └── @ CallNode (location: (0...15))
            ├── receiver: ∅
            ├── call_operator_loc: ∅
            ├── message_loc: (0...1) = "a"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (2...15))
            │   └── arguments: (length: 1)
            │       └── @ ParenthesesNode (location: (2...15))
            │           ├── body:
            │           │   @ StatementsNode (location: (3...14))
            │           │   └── body: (length: 1)
            │           │       └── @ ConstantPathOperatorWriteNode (location: (3...14))
            │           │           ├── target:
            │           │           │   @ ConstantPathNode (location: (3...7))
            │           │           │   ├── parent:
            │           │           │   │   @ ConstantReadNode (location: (3...4))
            │           │           │   │   └── name: :B
            │           │           │   ├── child:
            │           │           │   │   @ ConstantReadNode (location: (6...7))
            │           │           │   │   └── name: :C
            │           │           │   └── delimiter_loc: (4...6) = "::"
            │           │           ├── operator_loc: (8...10) = "*="
            │           │           ├── value:
            │           │           │   @ CallNode (location: (11...14))
            │           │           │   ├── receiver: ∅
            │           │           │   ├── call_operator_loc: ∅
            │           │           │   ├── message_loc: (11...12) = "d"
            │           │           │   ├── opening_loc: ∅
            │           │           │   ├── arguments:
            │           │           │   │   @ ArgumentsNode (location: (13...14))
            │           │           │   │   └── arguments: (length: 1)
            │           │           │   │       └── @ CallNode (location: (13...14))
            │           │           │   │           ├── receiver: ∅
            │           │           │   │           ├── call_operator_loc: ∅
            │           │           │   │           ├── message_loc: (13...14) = "e"
            │           │           │   │           ├── opening_loc: ∅
            │           │           │   │           ├── arguments: ∅
            │           │           │   │           ├── closing_loc: ∅
            │           │           │   │           ├── block: ∅
            │           │           │   │           ├── flags: variable_call
            │           │           │   │           └── name: "e"
            │           │           │   ├── closing_loc: ∅
            │           │           │   ├── block: ∅
            │           │           │   ├── flags: ∅
            │           │           │   └── name: "d"
            │           │           └── operator: :*
            │           ├── opening_loc: (2...3) = "("
            │           └── closing_loc: (14...15) = ")"
            ├── closing_loc: ∅
            ├── block: ∅
            ├── flags: ∅
            └── name: "a"
