syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"item.map(|i|"}]}
source_snippet:                             item.map(|i| &i.kind)
context_before:                         if let Some(hir::ItemKind::Impl(hir::Impl { self_ty, .. })) =
context_after:                         {