docs: private void setHint() {
          if (mPhoneEdit != null && mSelectedCountry != null && mSelectedCountry.getIso() != null) {
              Phonenumber.PhoneNumber phoneNumber = mPhoneUtil.getExampleNumberForType(mSelectedCountry.getIso(), PhoneNumberUtil.PhoneNumberType.MOBILE);
              if (phoneNumber != null) {
                  mPhoneEdit.setHint(mPhoneUtil.format(phoneNumber, PhoneNumberUtil.PhoneNumberFormat.NATIONAL));
              }
          }
      }