code: func (nodes CheckServiceNodes) Shuffle() {
  	for i := len(nodes) - 1; i > 0; i-- {
  		j := rand.Int31n(int32(i + 1))
  		nodes[i], nodes[j] = nodes[j], nodes[i]
  	}
  }
docs: // Shuffle does an in-place random shuffle using the Fisher-Yates algorithm.