@Override
  public ValidationResult validateCode(String system, String code, String display) {
    Coding c = new Coding(system, code, display);
    return validateCode(c, null);
  }
@ Override public ValidationResult validateCode ( String system , String code , String display ) { Coding c = new Coding ( system , code , display ) ; return validateCode ( c , null ) ; }
--- validate code -------------------------------------------------------------------------------