syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"(Some(tcx.def_span(def_id)),"}]}
source_snippet:                             (Some(tcx.def_span(def_id)), false)
context_before:                         (_, Some(def_id)) if def_id.is_local() && !is_derived => {
context_after:                         }