evsel__set_config_if_unset
evsel__set_config_if_unset(evsel, "sinkid", hash);
evsel__set_config_if_unset(cs_etm_evsel, "timestamp", 1);
evsel__set_config_if_unset(cs_etm_evsel, "contextid", 1);
evsel__set_config_if_unset(cs_etm_evsel, "timestamp", 1);
evsel__set_config_if_unset(evsel, "ts_enable", 1);
evsel__set_config_if_unset(intel_pt_evsel, "psb_period", 0);
evsel__set_config_if_unset(evsel, "krava01", 16);
evsel__set_config_if_unset(evsel, "krava11", 45);
evsel__set_config_if_unset(evsel, "krava02", 32);
evsel__set_config_if_unset(evsel, "krava03", 0);
evsel__set_config_if_unset(evsel, "krava13", 5);
evsel__set_config_if_unset(evsel, "krava21", 13905);
evsel__set_config_if_unset(evsel, "krava22", 11);
evsel__set_config_if_unset(evsel, "krava23", 0);
void evsel__set_config_if_unset(struct evsel *evsel, const char *config_name,