{"ast_node_type":"other","tokens":[{"end":20,"kind":"keyword","start":0,"text":"\"Option\""}]}
            "Option"
        let adt_name = if self.tcx.is_diagnostic_item(sym::Option, callee_adt.did()) {
        } else if self.tcx.is_diagnostic_item(sym::Result, callee_adt.did()) {