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@ ProgramNode (location: (1,0)-(1,14))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,14))
└── body: (length: 1)
└── @ InterpolatedStringNode (location: (1,0)-(1,14))
├── flags: ∅
├── opening_loc: ∅
├── parts: (length: 2)
│ ├── @ InterpolatedStringNode (location: (1,0)-(1,8))
│ │ ├── flags: ∅
│ │ ├── opening_loc: (1,0)-(1,1) = "\""
│ │ ├── parts: (length: 2)
│ │ │ ├── @ StringNode (location: (1,1)-(1,4))
│ │ │ │ ├── flags: frozen
│ │ │ │ ├── opening_loc: ∅
│ │ │ │ ├── content_loc: (1,1)-(1,4) = "foo"
│ │ │ │ ├── closing_loc: ∅
│ │ │ │ └── unescaped: "foo"
│ │ │ └── @ EmbeddedVariableNode (location: (1,4)-(1,7))
│ │ │ ├── operator_loc: (1,4)-(1,5) = "#"
│ │ │ └── variable:
│ │ │ @ InstanceVariableReadNode (location: (1,5)-(1,7))
│ │ │ └── name: :@a
│ │ └── closing_loc: (1,7)-(1,8) = "\""
│ └── @ StringNode (location: (1,9)-(1,14))
│ ├── flags: frozen
│ ├── opening_loc: (1,9)-(1,10) = "\""
│ ├── content_loc: (1,10)-(1,13) = "bar"
│ ├── closing_loc: (1,13)-(1,14) = "\""
│ └── unescaped: "bar"
└── closing_loc: ∅
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