logging

type Logger interface {
	// Info logs a message with optional structured data. Structured data must
	// be supplied as an array that alternates between string keys and values of
	// an arbitrary type.
	Info(msg string, keysAndValues ...interface{})

	// Debug logs a message with optional structured data. Structured data must
	// be supplied as an array that alternates between string keys and values of
	// an arbitrary type.
	Debug(msg string, keysAndValues ...interface{})

	// WithValues returns a Logger that will include the supplied structured
	// data with any subsequent messages it logs. Structured data must
	// be supplied as an array that alternates between string keys and values of
	// an arbitrary type.
	WithValues(keysAndValues ...interface{}) Logger
}