code: func containsNodePort(serviceNodePorts []ServiceNodePort, serviceNodePort ServiceNodePort) bool {
  	for _, snp := range serviceNodePorts {
  		if snp == serviceNodePort {
  			return true
  		}
  	}
  	return false
  }
docs: // This is O(N), but we expect serviceNodePorts to be small;
  // so small that we expect a linear search to be faster