syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if tcx.hir_opt_delegation_sig_id(hir_id.owner.def_id).is_some() {
context_before:     ) {
context_after:             // The body of the delegation item is synthesized, so it makes no sense