protected boolean init(ILineDataSet set){
  int size=set.getCircleColorCount();
  boolean changeRequired=false;
  if (circleBitmaps == null) {
    circleBitmaps=new Bitmap[size];
    changeRequired=true;
  }
 else   if (circleBitmaps.length != size) {
    circleBitmaps=new Bitmap[size];
    changeRequired=true;
  }
  return changeRequired;
}

protected boolean init ( ILineDataSet set ) { int size = set . getCircleColorCount ( ) ; boolean changeRequired = false ; if ( circleBitmaps == null ) { circleBitmaps = new Bitmap [ size ] ; changeRequired = true ; } else if ( circleBitmaps . length != size ) { circleBitmaps = new Bitmap [ size ] ; changeRequired = true ; } return changeRequired ; }
sets up the cache , returns true if a change of cache was required .
