syntax_data: {"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let [resume_ty, tupled_inputs_ty] = *sig_tys.inputs().as_slice() else {
context_before:         sig_tys.map_bound(|sig_tys| {
context_after:                 panic!();