syntax_data: {"ast_node_type":"variable","tokens":[{"end":82,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let lhs_sig_tys = lhs_sig_tys.skip_binder().inputs_and_output;
context_before:                 ty::FnPtr(rhs_sig_tys, rhs_hdr) => {
context_after:                     let rhs_sig_tys = rhs_sig_tys.skip_binder().inputs_and_output;