public List <ServiceVertexType> CreateVertexTypes(SecurityToken mySecurityToken, Int64 myTransactionToken,
List <ServiceVertexTypePredefinition> myVertexTypePreDef)
{
var Request = ServiceRequestFactory.MakeRequestCreateVertexTypes(myVertexTypePreDef);
var Response = this.GraphDS.CreateVertexTypes <IEnumerable <IVertexType> >(mySecurityToken, myTransactionToken, Request,
ServiceReturnConverter.ConvertOnlyVertexTypes);
return(Response.Select(x => new ServiceVertexType(x)).ToList());
}