Function setDesignationAt

library/include/modules/MapCache.h:539–548

if priority is 0, it is kept unchanged if previously set, otherwise 4000

    }
    // if priority is 0, it is kept unchanged if previously set, otherwise 4000
    bool setDesignationAt (DFCoord tilecoord, df::tile_designation des, int32_t priority = 0)
    {
        if (Block *b = BlockAtTile(tilecoord))
        {
            if (!b->setDesignationAt(tilecoord, des, priority))
                return false;
            return true;
        }
        return false;
    }

    int32_t priorityAt (DFCoord tilecoord)
    {