type Cluster interface {
	// ClientConnInterface interface allows Cluster use as grpc.ClientConnInterface
	// with lazy getting raw grpc-connection in Invoke() or NewStream() stages.
	// Lazy getting grpc-connection must use for embedded client-side balancing
	// DB may be put into code-generated client constructor as is.
	grpc.ClientConnInterface
	closer.Closer
}

type Connection interface {
	Cluster
	ConnectionInfo
	ConnectionDiscovery
}

type ConnectionDiscovery interface {
	Discovery() discovery.Client
}

type ConnectionInfo interface {
	// Endpoint returns initial endpoint
	Endpoint() string

	// Name returns database name
	Name() string

	// Secure returns true if database connection is secure
	Secure() bool
}