code: public static AxisAlignedBB combine(AxisAlignedBB[] aabbs)
  	{
  		if (ArrayUtils.isEmpty(aabbs))
  			return null;
  
  		AxisAlignedBB ret = null;
  		for (AxisAlignedBB aabb : aabbs)
  		{
  			if (ret == null)
  				ret = aabb;
  			else if (aabb != null)
  				ret = ret.union(aabb);
  		}
  
  		return ret;
  	}
docs: Gets a {@link AxisAlignedBB} that encompasses the passed {@code AxisAlignedBB}.
  
  @param aabbs the aabbs
  @return the axis aligned bb