@ ProgramNode (location: (0...47))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...47))
    └── body: (length: 2)
        ├── @ ArrayNode (location: (0...17))
        │   ├── elements: (length: 1)
        │   │   └── @ StringNode (location: (1...15))
        │   │       ├── opening_loc: (1...2) = "\""
        │   │       ├── content_loc: (2...14) = "  some text\n"
        │   │       ├── closing_loc: (14...15) = "\""
        │   │       └── unescaped: "  some text\n"
        │   ├── opening_loc: (0...1) = "["
        │   └── closing_loc: (16...17) = "]"
        └── @ ArrayNode (location: (19...47))
            ├── elements: (length: 1)
            │   └── @ StringNode (location: (20...27))
            │       ├── opening_loc: (20...27) = "<<-FILE"
            │       ├── content_loc: (29...41) = "  some text\n"
            │       ├── closing_loc: (41...46) = "FILE\n"
            │       └── unescaped: "  some text\n"
            ├── opening_loc: (19...20) = "["
            └── closing_loc: (46...47) = "]"
