//2-4个占4个格子的装饰
void addIsland4(GridBase grid, int index, Hashtable map)
{
List <int> cells = grid.getCells(index, editorCfg.pageSize);
int count = NumEx.NextInt(2, 5);
for (int i = 0; i <= count; i++)
{
int id = NumEx.NextBool() ? 2 : 3;
occupyCells(grid, cells, id, 1, map);
}
}