{"ast_node_type":"import","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
///     is bad, because the only local type with `T` as a subtree is
///     - e.g., `Vec<LocalType<T>>>` (or equivalently `Box<Vec<LocalType<T>>>`)
///     `LocalType<T>`, and `Vec<->` is between it and the type parameter.