syntax_data: {"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if let DefKind::Closure = tcx.def_kind(fn_def) {
context_before:     let mut abi = fn_sig.abi;
context_after:         // HACK(eddyb) Avoid having RustCall on closures,