syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"Ok(v)"}]}
source_snippet:                 Ok(v) if v.is_empty() => Ok(v),
context_before:             match needs_drop_components_with_async(tcx, elem_ty, asyncness) {
context_after:                 res => match size.try_to_target_usize(tcx) {