diff --git a/src/main/kotlin/net/axay/kspigot/extensions/bukkit/InventoryExtensions.kt b/src/main/kotlin/net/axay/kspigot/extensions/bukkit/InventoryExtensions.kt
index 9029835a..fe355292 100644
--- a/src/main/kotlin/net/axay/kspigot/extensions/bukkit/InventoryExtensions.kt
+++ b/src/main/kotlin/net/axay/kspigot/extensions/bukkit/InventoryExtensions.kt
@@ -1,5 +1,14 @@
 package net.axay.kspigot.extensions.bukkit
 
+import org.bukkit.event.inventory.InventoryAction
 import org.bukkit.inventory.Inventory
 
-fun Inventory.closeForViewers() = viewers.forEach { it.closeInventory() }
\ No newline at end of file
+fun Inventory.closeForViewers() = viewers.forEach { it.closeInventory() }
+
+val InventoryAction.isSimple
+    get() = when (this) {
+        InventoryAction.PLACE_ALL, InventoryAction.PLACE_ONE,
+        InventoryAction.PICKUP_ALL, InventoryAction.PICKUP_HALF, InventoryAction.PICKUP_ONE
+        -> true
+        else -> false
+    }
\ No newline at end of file