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@ ProgramNode (location: (1,0)-(1,5))
├── locals: []
└── statements:
@ StatementsNode (location: (1,0)-(1,5))
└── body: (length: 1)
└── @ InterpolatedStringNode (location: (1,0)-(1,5))
├── flags: ∅
├── opening_loc: (1,0)-(1,5) = "<<EOS"
├── parts: (length: 3)
│ ├── @ StringNode (location: (2,0)-(2,5))
│ │ ├── flags: frozen
│ │ ├── opening_loc: ∅
│ │ ├── content_loc: (2,0)-(2,5) = "foo\\r"
│ │ ├── closing_loc: ∅
│ │ └── unescaped: "foo\r"
│ ├── @ EmbeddedVariableNode (location: (2,5)-(2,10))
│ │ ├── operator_loc: (2,5)-(2,6) = "#"
│ │ └── variable:
│ │ @ InstanceVariableReadNode (location: (2,6)-(2,10))
│ │ └── name: :@bar
│ └── @ StringNode (location: (2,10)-(3,0))
│ ├── flags: frozen
│ ├── opening_loc: ∅
│ ├── content_loc: (2,10)-(3,0) = "\n"
│ ├── closing_loc: ∅
│ └── unescaped: "\n"
└── closing_loc: (3,0)-(4,0) = "EOS\n"
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