syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"hir::FnRetTy::Return(ty)"}]}
source_snippet:         hir::FnRetTy::Return(ty) => ty.span,
context_before:         hir::FnRetTy::DefaultReturn(_) => tcx.def_span(impl_fn.owner_id),
context_after:     };