CircularRegion A CircularRegion defines a circular region with a radius, latitude and longitude. 
LocationEvent This class captures all the necessary information for Airship Analytics
ProximityRegion A ProximityRegion defines a proximity region with an identifier, major, minor and optional latitude, longitude and RSSI. 
RegionEvent A RegionEvent defines a region with an identifier, major and minor and optional proximityRegion and/or circularRegion. 
RegionEvent.Builder Builder class for RegionEvent Objects.