Added EntityProvidedHolder

core/src/main/kotlin/com/willfp/libreforge/Holder.kt

@@ -4,6 +4,8 @@ import com.willfp.eco.util.NamespacedKeyUtils
 import com.willfp.libreforge.conditions.ConditionList
 import com.willfp.libreforge.effects.EffectList
 import org.bukkit.NamespacedKey
+import org.bukkit.entity.Entity
+import org.bukkit.entity.LivingEntity
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 import java.util.Objects
@@ -186,6 +188,27 @@ open class ItemProvidedHolder(
     }
 }
 
+/**
+ * A provided holder for an entity.
+ */
+open class EntityProvidedHolder(
+    override val holder: Holder,
+    override val provider: Entity
+) : ProvidedHolder {
+    override fun hashCode(): Int {
+        return Objects.hash(holder, provider)
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is EntityProvidedHolder) {
+            return false
+        }
+
+        return other.holder == this.holder
+                && other.provider == this.provider
+    }
+}
+
 // The current template ID, incremented every time a holder is created from a template.
 private val currentTemplateID = AtomicInteger(0)