public List <ServiceVertexInstance> Update(SecurityToken mySecurityToken, Int64 myTransactionToken, ServiceUpdateChangeset myUpdateChangeset)
{
var Request = ServiceRequestFactory.MakeRequestUpdate(myUpdateChangeset);
var Response = this.GraphDS.Update <IEnumerable <IVertex> >(mySecurityToken, myTransactionToken, Request, ServiceReturnConverter.ConvertOnlyVertices);
return(Response.Select(x => new ServiceVertexInstance(x)).ToList());
}