code: func (m *kubeGenericRuntimeManager) UpdatePodCIDR(podCIDR string) error {
  	// TODO(#35531): do we really want to write a method on this manager for each
  	// field of the config?
  	klog.Infof("updating runtime config through cri with podcidr %v", podCIDR)
  	return m.runtimeService.UpdateRuntimeConfig(
  		&runtimeapi.RuntimeConfig{
  			NetworkConfig: &runtimeapi.NetworkConfig{
  				PodCidr: podCIDR,
  			},
  		})
  }
docs: // UpdatePodCIDR is just a passthrough method to update the runtimeConfig of the shim
  // with the podCIDR supplied by the kubelet.