syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"ty::Tuple(tys)"}]}
source_snippet:             ty::Tuple(tys) => {
context_before:             // their constituent types implement `BikeshedGuaranteedNoDrop`.
context_after:                 obligations.extend(tys.iter().map(|elem_ty| {