public void setKey(String v) {
    if (DocumentKey_Type.featOkTst && ((DocumentKey_Type)jcasType).casFeat_key == null)
      jcasType.jcas.throwFeatMissing("key", "services.types.DocumentKey");
    jcasType.ll_cas.ll_setStringValue(addr, ((DocumentKey_Type)jcasType).casFeatCode_key, v);}