syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"ty::ClosureKind::Fn"}]}
source_snippet:             ty::ClosureKind::Fn => Ty::new_imm_ref(self, env_region, closure_ty),
context_before:         match closure_kind {
context_after:             ty::ClosureKind::FnMut => Ty::new_mut_ref(self, env_region, closure_ty),