syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"ty::ClosureKind::Fn"}]}
source_snippet:                         ty::ClosureKind::Fn => {
context_before:                     let self_ty = match args.kind() {
context_after:                             Ty::new_imm_ref(tcx, tcx.lifetimes.re_erased, closure_ty)