public int getMidIx() {int ixDiff = _highIx - _lowIx;if(ixDiff < 2) {return -1;}return _lowIx + (ixDiff / 2);}
public int GetMidIx(){int ixDiff = _highIx - _lowIx;if (ixDiff < 2){return -1;}return _lowIx + (ixDiff / 2);}