syntax_data: {"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"BoundRegionKind::ClosureEnv"}]}
source_snippet:             BoundRegionKind::ClosureEnv => LateParamRegionKind::ClosureEnv,
context_before:             BoundRegionKind::Named(def_id) => LateParamRegionKind::Named(def_id),
context_after:             BoundRegionKind::NamedAnon(name) => LateParamRegionKind::NamedAnon(var.as_u32(), name),