{"ast_node_type":"struct","tokens":[{"end":84,"kind":"keyword","start":0,"text":"///"}]}
/// on this struct for retrieving, and `TyBuilder::substs_for_closure` for creating.
/// Codes should not assume this ordering, and should always use methods available
pub(crate) struct ClosureSubst<'a>(pub(crate) &'a Substitution);