code: func (c *Cloud) getInstanceByNodeName(nodeName types.NodeName) (*ec2.Instance, error) {
  	instance, err := c.findInstanceByNodeName(nodeName)
  	if err == nil && instance == nil {
  		return nil, cloudprovider.ErrInstanceNotFound
  	}
  	return instance, err
  }
docs: // Returns the instance with the specified node name
  // Like findInstanceByNodeName, but returns error if node not found