{"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"Index(P<Expr>,"}]}
    Index(P<Expr>, P<Expr>, Span),
    /// The span represents the span of the `[2]`, including brackets.
    /// A range (e.g., `1..2`, `1..`, `..2`, `1..=2`, `..=2`; and `..` in destructuring assignment).