syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"ty::Tuple(fields)"}]}
source_snippet:         ty::Tuple(fields) => fields.iter().try_fold(SmallVec::new(), move |mut acc, elem| {
context_before:         // If any field needs drop, then the whole tuple does.
context_after:             acc.extend(needs_drop_components_with_async(tcx, elem, asyncness)?);