code: public static ASN1Set getInstance(
          Object  obj)
      {
          if (obj == null || obj instanceof ASN1Set)
          {
              return (ASN1Set)obj;
          }
  
          throw new IllegalArgumentException("unknown object in getInstance");
      }
docs: return an ASN1Set from the given object.
  
  @param obj the object we want converted.
  @exception IllegalArgumentException if the object cannot be converted.