@ ProgramNode (location: (1,0)-(1,12))
├── flags: ∅
├── locals: []
└── statements:
    @ StatementsNode (location: (1,0)-(1,12))
    ├── flags: ∅
    └── body: (length: 1)
        └── @ AliasMethodNode (location: (1,0)-(1,12))
            ├── flags: newline
            ├── new_name:
            │   @ SymbolNode (location: (1,6)-(1,8))
            │   ├── flags: static_literal, forced_us_ascii_encoding
            │   ├── opening_loc: ∅
            │   ├── value_loc: (1,6)-(1,8) = "in"
            │   ├── closing_loc: ∅
            │   └── unescaped: "in"
            ├── old_name:
            │   @ SymbolNode (location: (1,9)-(1,12))
            │   ├── flags: static_literal, forced_us_ascii_encoding
            │   ├── opening_loc: ∅
            │   ├── value_loc: (1,9)-(1,12) = "out"
            │   ├── closing_loc: ∅
            │   └── unescaped: "out"
            └── keyword_loc: (1,0)-(1,5) = "alias"
