code: public void setRegistryNumber(String v) {
      if (Chemical_Type.featOkTst && ((Chemical_Type)jcasType).casFeat_registryNumber == null)
        jcasType.jcas.throwFeatMissing("registryNumber", "de.julielab.jules.types.Chemical");
      jcasType.ll_cas.ll_setStringValue(addr, ((Chemical_Type)jcasType).casFeatCode_registryNumber, v);}
docs: setter for registryNumber - sets A unique 5 to 9 digit number in hyphenated format assigned by the Chemical Abstract Service to specify chemical substances, a zero is a valid number when an actual number cannot be located or is not yet available., C
  @generated
  @param v value to set into the feature