syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"t"}]}
source_snippet:             t
context_before:         if !t.has_vars_bound_at_or_above(self.debruijn) {
context_after:         } else if let Some(&t) = self.cache.get(&(self.debruijn, t)) {