{"ast_node_type":"impl","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
/// If this impl is an `ItemKind::Impl`, the `impl_id` is redundant (it could be the
/// that the `ref_id` is for. The `impl_id` maps to the "self type" of this impl.
/// same as the impl's `NodeId`).