{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"self.tcx.mk_bound_variable_kinds(&[ty::BoundVariableKind::Region("}]}
                    self.tcx.mk_bound_variable_kinds(&[ty::BoundVariableKind::Region(
                    ),
                        ty::BoundRegionKind::ClosureEnv,