def resources(namespace: nil)
      api_resources.map{ |api_resource|
        ResourceClient.new(@transport, self, api_resource,
                           namespace: namespace)
      }
    end
def resources(namespace: nil)
      api_resources.map{ |api_resource|
        ResourceClient.new(@transport, self, api_resource,
                           namespace: namespace)
      }
    end
TODO: skip non-namespaced resources if namespace is given, or ignore namespace?

 @param namespace [String, nil]
 @return [Array<K8s::ResourceClient>]