@ ProgramNode (location: (1,0)-(7,10))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(7,10))
    └── body: (length: 4)
        ├── @ CallNode (location: (1,0)-(1,9))
        │   ├── flags: attribute_write
        │   ├── receiver:
        │   │   @ CallNode (location: (1,0)-(1,3))
        │   │   ├── flags: variable_call
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :foo
        │   │   ├── message_loc: (1,0)-(1,3) = "foo"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   └── block: ∅
        │   ├── call_operator_loc: (1,3)-(1,4) = "."
        │   ├── name: :A=
        │   ├── message_loc: (1,4)-(1,5) = "A"
        │   ├── opening_loc: ∅
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (1,8)-(1,9))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ IntegerNode (location: (1,8)-(1,9))
        │   │           └── flags: decimal
        │   ├── closing_loc: ∅
        │   └── block: ∅
        ├── @ CallNode (location: (3,0)-(3,9))
        │   ├── flags: attribute_write
        │   ├── receiver:
        │   │   @ CallNode (location: (3,0)-(3,3))
        │   │   ├── flags: variable_call
        │   │   ├── receiver: ∅
        │   │   ├── call_operator_loc: ∅
        │   │   ├── name: :foo
        │   │   ├── message_loc: (3,0)-(3,3) = "foo"
        │   │   ├── opening_loc: ∅
        │   │   ├── arguments: ∅
        │   │   ├── closing_loc: ∅
        │   │   └── block: ∅
        │   ├── call_operator_loc: (3,3)-(3,4) = "."
        │   ├── name: :a=
        │   ├── message_loc: (3,4)-(3,5) = "a"
        │   ├── opening_loc: ∅
        │   ├── arguments:
        │   │   @ ArgumentsNode (location: (3,8)-(3,9))
        │   │   ├── flags: ∅
        │   │   └── arguments: (length: 1)
        │   │       └── @ IntegerNode (location: (3,8)-(3,9))
        │   │           └── flags: decimal
        │   ├── closing_loc: ∅
        │   └── block: ∅
        ├── @ ConstantPathWriteNode (location: (5,0)-(5,10))
        │   ├── target:
        │   │   @ ConstantPathNode (location: (5,0)-(5,6))
        │   │   ├── parent:
        │   │   │   @ CallNode (location: (5,0)-(5,3))
        │   │   │   ├── flags: variable_call
        │   │   │   ├── receiver: ∅
        │   │   │   ├── call_operator_loc: ∅
        │   │   │   ├── name: :foo
        │   │   │   ├── message_loc: (5,0)-(5,3) = "foo"
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── arguments: ∅
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── block: ∅
        │   │   ├── child:
        │   │   │   @ ConstantReadNode (location: (5,5)-(5,6))
        │   │   │   └── name: :A
        │   │   └── delimiter_loc: (5,3)-(5,5) = "::"
        │   ├── operator_loc: (5,7)-(5,8) = "="
        │   └── value:
        │       @ IntegerNode (location: (5,9)-(5,10))
        │       └── flags: decimal
        └── @ CallNode (location: (7,0)-(7,10))
            ├── flags: attribute_write
            ├── receiver:
            │   @ CallNode (location: (7,0)-(7,3))
            │   ├── flags: variable_call
            │   ├── receiver: ∅
            │   ├── call_operator_loc: ∅
            │   ├── name: :foo
            │   ├── message_loc: (7,0)-(7,3) = "foo"
            │   ├── opening_loc: ∅
            │   ├── arguments: ∅
            │   ├── closing_loc: ∅
            │   └── block: ∅
            ├── call_operator_loc: (7,3)-(7,5) = "::"
            ├── name: :a=
            ├── message_loc: (7,5)-(7,6) = "a"
            ├── opening_loc: ∅
            ├── arguments:
            │   @ ArgumentsNode (location: (7,9)-(7,10))
            │   ├── flags: ∅
            │   └── arguments: (length: 1)
            │       └── @ IntegerNode (location: (7,9)-(7,10))
            │           └── flags: decimal
            ├── closing_loc: ∅
            └── block: ∅
