ItemHelper#get/setEntityData - controls an item's entity NBT data (for item frames, armor stands, etc.), both a default impl using the old NBT methods & a 1.20 impl using item components.
CompundTag#size & #isEmpty util methods.
ItemAttributeNBT#from/toLegacyName - for managing the old/internal EquipmentSlot names it uses.
Changes
ItemArmorPose and ItemFrameInvisible now use the new ItemHelper#get/setEntityData
The legacy ItemAttributeNBT property was changed to use API instead of NBT editing (was going to use API anyway for 1.20.6, so might as well just not have the legacy NBT logic - tested on 1.17.1 & 1.20.6).
CustomNBT attribute-related methods were removed/moved to ItemAttributeNBT.
The legacyAttributeProperties warning was bumped to SlowWarning.
Additions
ItemHelper#get/setEntityData- controls an item's entity NBT data (for item frames, armor stands, etc.), both a default impl using the old NBT methods & a 1.20 impl using item components.CompundTag#size&#isEmptyutil methods.ItemAttributeNBT#from/toLegacyName- for managing the old/internalEquipmentSlotnames it uses.Changes
ItemArmorPoseandItemFrameInvisiblenow use the newItemHelper#get/setEntityDataItemAttributeNBTproperty was changed to use API instead of NBT editing (was going to use API anyway for 1.20.6, so might as well just not have the legacy NBT logic - tested on 1.17.1 & 1.20.6).CustomNBTattribute-related methods were removed/moved toItemAttributeNBT.legacyAttributePropertieswarning was bumped toSlowWarning.