@ ProgramNode (location: (1,0)-(1,42))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,42))
    └── body: (length: 1)
        └── @ CallNode (location: (1,0)-(1,42))
            ├── flags: attribute_write
            ├── receiver:
            │   @ ArrayNode (location: (1,0)-(1,12))
            │   ├── flags: ∅
            │   ├── elements: (length: 4)
            │   │   ├── @ IntegerNode (location: (1,1)-(1,2))
            │   │   │   ├── flags: decimal
            │   │   │   └── value: 1
            │   │   ├── @ IntegerNode (location: (1,4)-(1,5))
            │   │   │   ├── flags: decimal
            │   │   │   └── value: 2
            │   │   ├── @ IntegerNode (location: (1,7)-(1,8))
            │   │   │   ├── flags: decimal
            │   │   │   └── value: 3
            │   │   └── @ IntegerNode (location: (1,10)-(1,11))
            │   │       ├── flags: decimal
            │   │       └── value: 4
            │   ├── opening_loc: (1,0)-(1,1) = "["
            │   └── closing_loc: (1,11)-(1,12) = "]"
            ├── call_operator_loc: ∅
            ├── name: :[]=
            ├── message_loc: (1,12)-(1,24) = "[from .. to]"
            ├── opening_loc: (1,12)-(1,13) = "["
            ├── arguments:
            │   @ ArgumentsNode (location: (1,13)-(1,42))
            │   ├── flags: ∅
            │   └── arguments: (length: 2)
            │       ├── @ RangeNode (location: (1,13)-(1,23))
            │       │   ├── flags: ∅
            │       │   ├── left:
            │       │   │   @ CallNode (location: (1,13)-(1,17))
            │       │   │   ├── flags: variable_call, ignore_visibility
            │       │   │   ├── receiver: ∅
            │       │   │   ├── call_operator_loc: ∅
            │       │   │   ├── name: :from
            │       │   │   ├── message_loc: (1,13)-(1,17) = "from"
            │       │   │   ├── opening_loc: ∅
            │       │   │   ├── arguments: ∅
            │       │   │   ├── closing_loc: ∅
            │       │   │   └── block: ∅
            │       │   ├── right:
            │       │   │   @ CallNode (location: (1,21)-(1,23))
            │       │   │   ├── flags: variable_call, ignore_visibility
            │       │   │   ├── receiver: ∅
            │       │   │   ├── call_operator_loc: ∅
            │       │   │   ├── name: :to
            │       │   │   ├── message_loc: (1,21)-(1,23) = "to"
            │       │   │   ├── opening_loc: ∅
            │       │   │   ├── arguments: ∅
            │       │   │   ├── closing_loc: ∅
            │       │   │   └── block: ∅
            │       │   └── operator_loc: (1,18)-(1,20) = ".."
            │       └── @ ArrayNode (location: (1,27)-(1,42))
            │           ├── flags: ∅
            │           ├── elements: (length: 3)
            │           │   ├── @ StringNode (location: (1,28)-(1,31))
            │           │   │   ├── flags: ∅
            │           │   │   ├── opening_loc: (1,28)-(1,29) = "\""
            │           │   │   ├── content_loc: (1,29)-(1,30) = "a"
            │           │   │   ├── closing_loc: (1,30)-(1,31) = "\""
            │           │   │   └── unescaped: "a"
            │           │   ├── @ StringNode (location: (1,33)-(1,36))
            │           │   │   ├── flags: ∅
            │           │   │   ├── opening_loc: (1,33)-(1,34) = "\""
            │           │   │   ├── content_loc: (1,34)-(1,35) = "b"
            │           │   │   ├── closing_loc: (1,35)-(1,36) = "\""
            │           │   │   └── unescaped: "b"
            │           │   └── @ StringNode (location: (1,38)-(1,41))
            │           │       ├── flags: ∅
            │           │       ├── opening_loc: (1,38)-(1,39) = "\""
            │           │       ├── content_loc: (1,39)-(1,40) = "c"
            │           │       ├── closing_loc: (1,40)-(1,41) = "\""
            │           │       └── unescaped: "c"
            │           ├── opening_loc: (1,27)-(1,28) = "["
            │           └── closing_loc: (1,41)-(1,42) = "]"
            ├── closing_loc: (1,23)-(1,24) = "]"
            └── block: ∅