An IItemDefinition object is the direct reference to an item.
It is different from an IItemStack as this only refers to the item, it does not include any meta-information or NBT-values!

It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import.
import crafttweaker.item.IItemDefinition;

The easiest way is from an IItemStack, but you can also get a list of all registered IItemDefinitions in the game and do something with that.

ZenScript
 Copy
//IItemStack Zengetter "definition" -> single IItemDefinition
val itemDefinition = <minecraft:stone>.definition;

//IGame zengetter "items" -> LIST!
val itemDefinitionList = game.items;

ZenGetter	功能	返回值类型
ZenGetter id	功能 Returns the item ID	返回值类型 string
ZenGetter name（名称）	功能 Returns the unlocalized item Name	返回值类型 string
ZenGetter ores	功能 Returns all ore entries containing this item. Can also contain ore entries that refer to a sub-item.	返回值类型 List<IOreDictEntry>
ZenGetter owner	功能 Returns the mod name that this item belongs to.	返回值类型 string
ZenGetter defaultInstance	功能 ​	返回值类型 IItemstack
ZenGetter creativeTab	功能 ​	返回值类型 ICreativeTab
ZenGetter creativeTabs	功能 ​	返回值类型 ICreativeTab[]
ZenGetter canItemEditBlocks	功能 ​	返回值类型 bool
ZenGetter itemEnchantability	功能 ​	返回值类型 int
ZenGetter subItems	功能 Returns a list of all subitems that are registered to this item. (like how potions have other items). This is not guaranteed to return the correct list for mods on a server.	返回值类型 List<IItemStack>

ZenSetter/ZenMethod	参数类型
ZenSetter/ZenMethod creativeTab	参数类型 ICreativeTab
ZenSetter/ZenMethod setNoRepair()	参数类型 none
ZenSetter/ZenMethod setContainerItem(IItemDefinition item)	参数类型 IItemDefinition

• def.makeStack(meta); Creates an IItemStack with the given metadata. Metadata is an int and OPTIONAL.
• def.setHarvestLevel(String type, int level); Changes the item's harvest level to the corresponding type and level
• def.getSubItems(creativeTab); Returns a List<IItemStack> with all subitems for the given ICreativeTab. This is not guaranteed to return the correct list for mods on a server.
• def.getItemBurntime(item); Returns an int representing either -1 (Vanilla logic will apply), 0 (Not smeltable) or the items burntime