private String isPermissionGranted() {
        // return -1 for denied and 1
        int res = ActivityCompat.checkSelfPermission(getReactApplicationContext(), PERMISSION_READ_CONTACTS);
        return (res == PackageManager.PERMISSION_GRANTED) ? PERMISSION_AUTHORIZED : PERMISSION_DENIED;
    }
Retrieves <code>contact</code> for contact, or <code>null</code> if not
available.

@param contactId contact identifier, <code>recordID</code>
android/src/main/java/com/rt2zz/reactnativecontacts/impl/ContactsManagerImpl.java