logger

type Attribute interface {
	Key() string
	Value() interface{}
}

type LoggerAPI interface {
	// Debug outputs messages using debug level.
	Debug(ctx context.Context, msg string, attrs ...Attribute)

	// Internal outputs messages using the internal level.
	Internal(ctx context.Context, msg string, attrs ...Attribute)

	// Info outputs messages using the info level.
	Info(ctx context.Context, msg string, attrs ...Attribute)

	// Warn outputs messages using warning level.
	Warn(ctx context.Context, msg string, attrs ...Attribute)

	// Error outputs messages using error level.
	Error(ctx context.Context, msg string, attrs ...Attribute)

	// Fatal outputs message using fatal level.
	Fatal(ctx context.Context, msg string, attrs ...Attribute)

	// SetLogLevel changes the current messages log level.
	SetLogLevel(level string) (string, error)

	// Level gets the current log level.
	Level() string
}