question: public Track ( Context context ) { track = new ArrayList < TrackPoint > ( ) ; ctx = context ; if ( isOpen ) { markSavingBroken ( "Attempted to open multiple instances of Track - saving disabled" , null ) ; } else { isOpen = true ; Log . i ( TAG , "Opened track" ) ; asyncLoad ( ) ; } }
target:  Indicates how many of the track points are already in the save file.