code: func GetDefaultMutators() map[string][]PodSpecMutatorFunc {
  	return map[string][]PodSpecMutatorFunc{
  		kubeadmconstants.KubeAPIServer: {
  			addNodeSelectorToPodSpec,
  			setControlPlaneTolerationOnPodSpec,
  			setRightDNSPolicyOnPodSpec,
  			setHostIPOnPodSpec,
  		},
  		kubeadmconstants.KubeControllerManager: {
  			addNodeSelectorToPodSpec,
  			setControlPlaneTolerationOnPodSpec,
  			setRightDNSPolicyOnPodSpec,
  		},
  		kubeadmconstants.KubeScheduler: {
  			addNodeSelectorToPodSpec,
  			setControlPlaneTolerationOnPodSpec,
  			setRightDNSPolicyOnPodSpec,
  		},
  	}
  }
docs: // GetDefaultMutators gets the mutator functions that always should be used