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type ApplicationAPI interface {
	Close() error
	UnitsInfo(units []names.UnitTag) ([]application.UnitInfo, error)
}

type CharmsAPI interface {
	Close() error
	CharmInfo(charmURL string) (*commoncharm.CharmInfo, error)
}

type CloudCredentialAPI interface {
	Cloud(tag names.CloudTag) (jujucloud.Cloud, error)
	CredentialContents(cloud, credential string, withSecrets bool) ([]params.CredentialContentResult, error)
	BestAPIVersion() int
	Close() error
}

type Context interface {
	InterruptNotify(c chan<- os.Signal)
	StopInterruptNotify(c chan<- os.Signal)
	GetStdout() io.Writer
	GetStderr() io.Writer
	GetStdin() io.Reader
}

type ModelAPI interface {
	Close() error
	ModelInfo([]names.ModelTag) ([]params.ModelInfoResult, error)
}

type ModelCommand interface {
	NewControllerAPIRoot() (api.Connection, error)
	ModelDetails() (string, *jujuclient.ModelDetails, error)
	NewAPIRoot() (api.Connection, error)
	NewAPIClient() (*api.Client, error)
	ModelIdentifier() (string, error)
}

type StatusAPI interface {
	Status([]string) (*params.FullStatus, error)
	Close() error
}