syntax_data: {"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let Binder { value, bound_vars } = self;
context_before:     pub fn iter(self) -> impl Iterator<Item = Binder<I, T::Item>> {
context_after:         value.into_iter().map(move |value| Binder { value, bound_vars })