syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"self.bound_vars().encode(e);"}]}
source_snippet:                     self.bound_vars().encode(e);
context_before:                 fn encode(&self, e: &mut E) {
context_after:                     self.as_ref().skip_binder().encode(e);