kubernetes/vendor/github.com/google/uuid/version1.go

// NewUUID returns a Version 1 UUID based on the current NodeID and clock
// sequence, and the current time.  If the NodeID has not been set by SetNodeID
// or SetNodeInterface then it will be set automatically.  If the NodeID cannot
// be set NewUUID returns nil.  If clock sequence has not been set by
// SetClockSequence then it will be set automatically.  If GetTime fails to
// return the current NewUUID returns nil and an error.
//
// In most cases, New should be used.
func NewUUID() (UUID, error) { … }