code: public static DERUniversalString getInstance(
          Object  obj)
      {
          if (obj == null || obj instanceof DERUniversalString)
          {
              return (DERUniversalString)obj;
          }
  
          if (obj instanceof ASN1OctetString)
          {
              return new DERUniversalString(((ASN1OctetString)obj).getOctets());
          }
  
          throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
      }
docs: return a Universal String from the passed in object.
  
  @exception IllegalArgumentException if the object cannot be converted.