syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"BoundRegionKind::ClosureEnv"}]}
source_snippet:             BoundRegionKind::ClosureEnv => write!(f, "{:?}.Env", self.var),
context_before:             BoundRegionKind::Anon => write!(f, "{:?}", self.var),
context_after:             BoundRegionKind::Named(def) => {