subcmds

type Collection interface {
	Commands() []cli.Command
}

type Executor interface {
	Execute(c *cli.Context) error
}

type ExecutorWithCommands interface {
	Executor
	Collection
}

type RegisterableCollection interface {
	Collection
	RegisterCommand(cmd cli.Command)
	Register(name, usage string, flags ...cli.Flag) RegistrationContext
}

type RegistrationContext interface {
	Configure(cfg func(cli.Command)) RegistrationContext
	Executor(exec Executor)
	Commands(coll Collection)
	ExecutorWithCommands(execColl ExecutorWithCommands)
}