type ConfigAPIClient interface {
    ConfigList(ctx context.Context, options types.ConfigListOptions) ([]swarm.Config, error)
    ConfigCreate(ctx context.Context, config swarm.ConfigSpec) (types.ConfigCreateResponse, error)
    ConfigRemove(ctx context.Context, id string) error
    ConfigInspectWithRaw(ctx context.Context, name string) (swarm.Config, []byte, error)