MMKRouteSummaryBalloon

class MMKRouteSummaryBalloon : NSObject

 init(summary: MMKDrivingSummary,
         tags: [String],
 relativeWeight: MMKDrivingWeight?)

var summary: MMKDrivingSummary { get }

var tags: [String] { get }

var relativeWeight: MMKDrivingWeight? { get }
presented only if any another route selected in navigation layer contains (weight(alternative) - weight(selectedRoute)) automatically updated on selected route changing

Optional field, can be nil

 init(summary: MMKDrivingSummary,
         tags: [String],
 relativeWeight: MMKDrivingWeight?)

var summary: MMKDrivingSummary { get }

var tags: [String] { get }

var relativeWeight: MMKDrivingWeight? { get }