tracer

type LogLevel string

type Tracer interface {
	// Start the named tracer.
	Start(format string, args ...interface{})

	// Stop the named tracer.
	Stop(format string, args ...interface{})

	// Log a message.
	Log(format string, args ...interface{})

	// LogError logs an error message.
	LogError(format string, args ...interface{})

	// Close the tracer.
	Close()

	Debug() Tracer

	// WithLevel is used to set tracer log level at creation
	WithLevel(level LogLevel)
}