code: func (c *controllerCommon) getNodeDataDisks(nodeName types.NodeName) ([]compute.DataDisk, error) {
  	vmset, err := c.getNodeVMSet(nodeName)
  	if err != nil {
  		return nil, err
  	}
  
  	return vmset.GetDataDisks(nodeName)
  }
docs: // getNodeDataDisks invokes vmSet interfaces to get data disks for the node.