public LookupManager( IKernel kernel, IDependencyModel[] dependencies )
            {
                m_kernel = kernel;

                foreach(IDependencyModel dependency in dependencies )
                {
                    if (!kernel.HasService( dependency.Service ))
                    {
                        if (!dependency.Optional)
                        {
                            throw new LookupException( dependency.LookupKey, "Kernel can't supply specified service.");
                        }
                        else
                        {
                            continue;
                        }
                    }

                    m_key2handler[ dependency.LookupKey ] =
                        kernel.GetHandlerForService( dependency.Service );
                }
            }