code: func (c *MemberlistManager) SetPriority(prio int) {
  	c.Lock()
  	node := c.members[c.nodeName]
  	if !node.SetPriority(prio) {
  		c.Unlock()
  		return
  	}
  	c.members[c.nodeName] = node
  	c.Unlock()
  	nodePriority.Set(prio)
  	c.BroadcastUpdate()
  }
docs: // set the priority of this node.
  // lower values == higher priority