syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"DefKind::AssocFn"}]}
source_snippet:         DefKind::AssocFn | DefKind::Fn => "function argument",
context_before:     let origin = match tcx.def_kind(def_id) {
context_after:         DefKind::Closure => "closure argument",