syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                 if tcx.is_async_drop_in_place_coroutine(def_id) {
context_before:             variant.iter().map(move |field| {
context_after:                     layout.field_tys[*field].ty