Some EntityItem stuff

mappings/net/minecraft/entity/Entity.mapping

@@ -3,6 +3,7 @@ CLASS none/se net/minecraft/entity/Entity
 	FIELD L fallDistance F
 	FIELD S rand Ljava/util/Random;
 	FIELD Z dataTracker Lnone/km;
+	FIELD aB NAME_TRACKER Lnone/kj;
 	FIELD aF invulnerable Z
 	FIELD a LOGGER Lorg/apache/logging/log4j/Logger;
 	FIELD aa flags Lnone/kj;
@@ -100,6 +101,7 @@ CLASS none/se net/minecraft/entity/Entity
 	METHOD k getTrackedBoolean (I)Z
 		ARG 0 id
 	METHOD m update ()V
+	METHOD n_ hasCustomName ()Z
 	METHOD o_ getPistonBehavior ()Lnone/ayr;
 	METHOD w hasPassenger (Lnone/se;)Z
 		ARG 0 entity

mappings/net/minecraft/entity/impl/EntityItem.mapping

@@ -1,9 +1,15 @@
 CLASS none/yy net/minecraft/entity/impl/EntityItem
+	FIELD b LOGGER Lorg/apache/logging/log4j/Logger;
+	FIELD c STACK_TRACKER Lnone/kj;
 	FIELD d age I
 	FIELD e pickupDelay I
 	FIELD f health I
 	FIELD g thrower Ljava/lang/String;
 	FIELD h owner Ljava/lang/String;
+	METHOD a setPickupDelay (I)V
+		ARG 0 delay
+	METHOD a setStack (Lnone/aeq;)V
+		ARG 0 stack
 	METHOD a deserializeEntityTag (Lnone/dt;)V
 	METHOD a (Lnone/yy;)Z
 	METHOD b serializeEntityTag (Lnone/dt;)V
@@ -11,6 +17,9 @@ CLASS none/yy net/minecraft/entity/impl/EntityItem
 		ARG 0 dimensionId
 	METHOD e setThrower (Ljava/lang/String;)V
 	METHOD h_ getName ()Ljava/lang/String;
+	METHOD k getStack ()Lnone/aeq;
 	METHOD l getOwner ()Ljava/lang/String;
 	METHOD m update ()V
 	METHOD n getThrower ()Ljava/lang/String;
+	METHOD r resetPickupDelay ()V
+	METHOD s setPickupDelayInfinite ()V

mappings/net/minecraft/item/ItemStack.mapping

@@ -24,6 +24,7 @@ CLASS none/aeq net/minecraft/item/ItemStack
 	METHOD B getRepairCost ()I
 	METHOD E getStackSize ()I
 	METHOD F updateIsInvalid ()V
+	METHOD a getTranslationKey ()Ljava/lang/String;
 	METHOD a damageStack (ILnone/sn;)V
 	METHOD a setTagCompound (Ljava/lang/String;Lnone/eh;)V
 	METHOD a activate (Lnone/aak;Lnone/aiu;Lnone/cn;Lnone/qz;Lnone/cu;FFF)Lnone/rb;