{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//!"}]}
//! `T` is constrained to be `<I as Iterator>::Item`, so we check only
//! We get that the generic parameters for `impl2` are `[T, std::vec::IntoIter<T>]`.
//! `std::vec::IntoIter<T>` for repeated parameters, which it doesn't have. The