in internal/flags/create_flags.go [120:127]
func milestoneFlag(hidden bool) *cli.StringSliceFlag {
return &cli.StringSliceFlag{
Name: Milestone,
Usage: `List of the titles of each milestone the release is associated with (e.g. --milestone "v1.0" --milestone "v1.0-rc)"; each milestone needs to exist `,
Required: false,
Hidden: hidden,
}
}