code: protected void putIntoSrcList( SetTrackInfo<Desc> info ) {
  		// make sure isAssociated is large enough
  		if( info.isAssociated.length < info.tracks.size() ) {
  			info.isAssociated = new boolean[ info.tracks.size() ];
  		}
  
  		info.featSrc.reset();
  		info.locSrc.reset();
  
  		for( int i = 0; i < info.tracks.size(); i++ ) {
  			PointTrack t = info.tracks.get(i);
  			Desc desc = t.getDescription();
  			info.featSrc.add(desc);
  			info.locSrc.add(t);
  			info.isAssociated[i] = false;
  		}
  	}
docs: Put existing tracks into source list for association