question: public void add ( final int start , final int end , final byte status ) { final int s = start - mStart ; if ( s < mInterval . length && end > mStart ) { Arrays . fill ( mInterval , Math . max ( s , 0 ) , Math . min ( end - mStart , mInterval . length ) , status ) ; } }
target:  Add points to the interval. Regions outside the overall interval are ignored.