fix "avoid hopper searches" and make it use an obfhelper

Spigot-Server-Patches/Avoid-hopper-searches-if-there-are-no-items.patch

@@ -63,7 +63,7 @@ index 7ac07ac07ac0..7ac07ac07ac0 100644
 +                * Make sure the inventory selector stays in sync.
 +                * It should be the one that checks `var1 instanceof IInventory && var1.isAlive()`
 +                */
-+                if (predicate == IEntitySelector.c && inventoryEntityCounts[k] <= 0) continue;
++                if (predicate == IEntitySelector.isInventory() && inventoryEntityCounts[k] <= 0) continue;
 +                // Paper end
                  while (iterator.hasNext()) {
                      Entity entity1 = (Entity) iterator.next();
@@ -87,4 +87,16 @@ index 7ac07ac07ac0..7ac07ac07ac0 100644
              Iterator iterator = this.entitySlices[k].iterator(); // Spigot
  
              while (iterator.hasNext()) {
+diff --git a/src/main/java/net/minecraft/server/IEntitySelector.java b/src/main/java/net/minecraft/server/IEntitySelector.java
+index 7ac07ac07ac0..7ac07ac07ac0 100644
+--- a/src/main/java/net/minecraft/server/IEntitySelector.java
++++ b/src/main/java/net/minecraft/server/IEntitySelector.java
+@@ -0,0 +0,0 @@ public final class IEntitySelector {
+     public static final Predicate<Entity> c = (entity) -> {
+         return entity.isAlive() && !entity.isVehicle() && !entity.isPassenger();
+     };
++    public static final Predicate<Entity> isInventory() { return d; } // Paper - OBFHELPER
+     public static final Predicate<Entity> d = (entity) -> {
+         return entity instanceof IInventory && entity.isAlive();
+     };
 --