001    package net.minecraft.item;
002    
003    import net.minecraft.entity.player.EntityPlayer;
004    import net.minecraft.network.packet.Packet;
005    import net.minecraft.world.World;
006    
007    public class ItemMapBase extends Item
008    {
009        protected ItemMapBase(int par1)
010        {
011            super(par1);
012        }
013    
014        /**
015         * false for all Items except sub-classes of ItemMapBase
016         */
017        public boolean isMap()
018        {
019            return true;
020        }
021    
022        /**
023         * returns null if no update is to be sent
024         */
025        public Packet createMapDataPacket(ItemStack par1ItemStack, World par2World, EntityPlayer par3EntityPlayer)
026        {
027            return null;
028        }
029    }