syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"layout.variant_fields.iter().map(move"}]}
source_snippet:         layout.variant_fields.iter().map(move |variant| {
context_before:         let layout = tcx.coroutine_layout(def_id, self.args).unwrap();
context_after:             variant.iter().map(move |field| {