Delegate ItemStack (#10852)

patches/api/0473-General-ItemMeta-fixes.patch

@@ -19,3 +19,55 @@ index 637fa73d4366c2d88e2716e5c8d3465706d788a7..0f03c546ecdd6383fb36a362d18d6fb5
          this.flicker = flicker;
          this.trail = trail;
          this.colors = colors;
+diff --git a/src/main/java/org/bukkit/inventory/meta/Damageable.java b/src/main/java/org/bukkit/inventory/meta/Damageable.java
+index ff6818b6d9e0207eafdd749928f33aeac3f27191..992f39da07bafe9769effaa7dc6adc018c89329d 100644
+--- a/src/main/java/org/bukkit/inventory/meta/Damageable.java
++++ b/src/main/java/org/bukkit/inventory/meta/Damageable.java
+@@ -9,14 +9,17 @@ import org.jetbrains.annotations.Nullable;
+ public interface Damageable extends ItemMeta {
+ 
+     /**
+-     * Checks to see if this item has damage
++     * Checks to see if this item has damage greater than 0.
+      *
+-     * @return true if this has damage
++     * @return true if this has damage > 0
+      */
+     boolean hasDamage();
+ 
+     /**
+      * Gets the damage
++     * <p>
++     * Call {@link #hasDamageValue()} to be sure
++     * a damage value is set.
+      *
+      * @return the damage
+      */
+@@ -26,9 +29,27 @@ public interface Damageable extends ItemMeta {
+      * Sets the damage
+      *
+      * @param damage item damage
++     * @see #resetDamage() to reset and clear the damage data component
+      */
+     void setDamage(int damage);
+ 
++    // Paper start
++    /**
++     * Checks if any damage value, including 0,
++     * is set on this meta.
++     *
++     * @return true if any value is set
++     */
++    boolean hasDamageValue();
++
++    /**
++     * Clears the damage component from the meta. Differs
++     * from {@code setDamage(0)} in that it removes the component
++     * instead of adding the component with a value of 0.
++     */
++    void resetDamage();
++    // Paper end
++
+     /**
+      * Checks to see if this item has a maximum amount of damage.
+      *