internal new static DatatypeImplementation DeriveByUnion(XmlSchemaSimpleType[] types, XmlSchemaType schemaType)
{
DatatypeImplementation dt = new Datatype_union(types);
dt._baseType = s_anySimpleType; //Base type of a union is anySimpleType
dt._variety = XmlSchemaDatatypeVariety.Union;
dt._parentSchemaType = schemaType;
return dt;
}