syntax_data: {"ast_node_type":"other","tokens":[{"end":5,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:     {
context_before:     ) -> UnordItems<(hir::ItemLocalId, &'a V), impl Iterator<Item = (hir::ItemLocalId, &'a V)>>
context_after:         self.data.items().map(|(id, value)| (*id, value))