syntax_data: {"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"ty::Alias(kind,"}]}
source_snippet:             ty::Alias(kind, alias_ty) => {
context_before:             // requires that `Pi: 'a` for all `i`.
context_after:                 if !alias_ty.has_escaping_bound_vars() {