syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"Res::Def(DefKind::Fn,"}]}
source_snippet:             Res::Def(DefKind::Fn, _)
context_before:             // A regular function, constructor function or a constant.
context_after:             | Res::Def(DefKind::AssocFn, _)