The class corresponds to following ASN.1 type:
Attribute ::= SEQUENCE {
type AttributeType,
values SET SIZE (0..MAX) OF AttributeValue }
AttributeType ::= OBJECT IDENTIFIER
AttributeValue ::= ANY DEFINED BY AttributeType
ASN1OpenType.Id id = new ASN1OpenType.Id();
ASN1OpenType any = new ASN1OpenType(id, set);
return new ASN1Sequence(new ASN1Type[] { id, new ASN1SetOf(any) });