syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"ty::FnPtr(lhs_sig_tys,"}]}
source_snippet:             ty::FnPtr(lhs_sig_tys, lhs_hdr) => match rhs.kind() {
context_after:                 ty::FnPtr(rhs_sig_tys, rhs_hdr) => {