Build the halo layer in the background, since it can be pretty expensive to build.
Build the halo layer in the background, since it can be pretty expensive to build.

robinpowered/SVPulsingAnnotationView,TaemoonCho/SVPulsingAnnotationView,mitchellporter/SVPulsingAnnotationView,TransitApp/SVPulsingAnnotationView,mohsinalimat/SVPulsingAnnotationView