@ ProgramNode (location: (1,0)-(7,5))
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(7,5))
    └── body: (length: 4)
        ├── @ XStringNode (location: (1,0)-(1,7))
        │   ├── flags: ∅
        │   ├── opening_loc: (1,0)-(1,3) = "%x["
        │   ├── content_loc: (1,3)-(1,6) = "foo"
        │   ├── closing_loc: (1,6)-(1,7) = "]"
        │   └── unescaped: "foo"
        ├── @ InterpolatedXStringNode (location: (3,0)-(3,16))
        │   ├── opening_loc: (3,0)-(3,1) = "`"
        │   ├── parts: (length: 3)
        │   │   ├── @ StringNode (location: (3,1)-(3,5))
        │   │   │   ├── flags: ∅
        │   │   │   ├── opening_loc: ∅
        │   │   │   ├── content_loc: (3,1)-(3,5) = "foo "
        │   │   │   ├── closing_loc: ∅
        │   │   │   └── unescaped: "foo "
        │   │   ├── @ EmbeddedStatementsNode (location: (3,5)-(3,11))
        │   │   │   ├── opening_loc: (3,5)-(3,7) = "\#{"
        │   │   │   ├── statements:
        │   │   │   │   @ StatementsNode (location: (3,7)-(3,10))
        │   │   │   │   └── body: (length: 1)
        │   │   │   │       └── @ CallNode (location: (3,7)-(3,10))
        │   │   │   │           ├── flags: variable_call
        │   │   │   │           ├── receiver: ∅
        │   │   │   │           ├── call_operator_loc: ∅
        │   │   │   │           ├── name: :bar
        │   │   │   │           ├── message_loc: (3,7)-(3,10) = "bar"
        │   │   │   │           ├── opening_loc: ∅
        │   │   │   │           ├── arguments: ∅
        │   │   │   │           ├── closing_loc: ∅
        │   │   │   │           └── block: ∅
        │   │   │   └── closing_loc: (3,10)-(3,11) = "}"
        │   │   └── @ StringNode (location: (3,11)-(3,15))
        │   │       ├── flags: ∅
        │   │       ├── opening_loc: ∅
        │   │       ├── content_loc: (3,11)-(3,15) = " baz"
        │   │       ├── closing_loc: ∅
        │   │       └── unescaped: " baz"
        │   └── closing_loc: (3,15)-(3,16) = "`"
        ├── @ XStringNode (location: (5,0)-(5,6))
        │   ├── flags: ∅
        │   ├── opening_loc: (5,0)-(5,1) = "`"
        │   ├── content_loc: (5,1)-(5,5) = "f\\oo"
        │   ├── closing_loc: (5,5)-(5,6) = "`"
        │   └── unescaped: "foo"
        └── @ XStringNode (location: (7,0)-(7,5))
            ├── flags: ∅
            ├── opening_loc: (7,0)-(7,1) = "`"
            ├── content_loc: (7,1)-(7,4) = "foo"
            ├── closing_loc: (7,4)-(7,5) = "`"
            └── unescaped: "foo"