etcdserver/api/v2store/node.go
func (n *node) IsHidden() bool {
	_, name := path.Split(n.Path)

	return name[0] == '_'
}
func (n *node) IsHidden() bool {
	_, name := path.Split(n.Path)

	return name[0] == '_'
}
// IsHidden function checks if the node is a hidden node. A hidden node
// will begin with '_'
// A hidden node will not be shown via get command under a directory
// For example if we have /foo/_hidden and /foo/notHidden, get "/foo"
// will only return /foo/notHidden