114     private Preference mButtonWifiCalling;  field in CallFeaturesSetting
304             if (mButtonWifiCalling != null) {  in onCallStateChanged()
305                 mButtonWifiCalling.setEnabled(isCallStateIdle);  in onCallStateChanged()
377         mButtonWifiCalling = findPreference(getResourcesForSubId().getString(  in onResume()
481                     mButtonWifiCalling.setTitle(resolutions.get(0).loadLabel(pm));  in updateVtWfc()
482                     mButtonWifiCalling.setSummary(null);  in updateVtWfc()
483                     mButtonWifiCalling.setIntent(intent);  in updateVtWfc()
484                     prefSet.addPreference(mButtonWifiCalling);  in updateVtWfc()
486                     prefSet.removePreference(mButtonWifiCalling);  in updateVtWfc()
489                 prefSet.removePreference(mButtonWifiCalling);  in updateVtWfc()
492             prefSet.removePreference(mButtonWifiCalling);  in updateVtWfc()
495             mButtonWifiCalling.setTitle(title);  in updateVtWfc()
516             mButtonWifiCalling.setSummary(getResourcesForSubId().getString(resId));  in updateVtWfc()
517             Intent intent = mButtonWifiCalling.getIntent();  in updateVtWfc()
521             prefSet.addPreference(mButtonWifiCalling);  in updateVtWfc()
528                 prefSet.removePreference(mButtonWifiCalling);  in updateVtWfc()
533             prefSet.removePreference(mButtonWifiCalling);  in updateVtWfc()