Add folia check

worldedit-bukkit/adapters/adapter-1_19_4/src/main/java/com/sk89q/worldedit/bukkit/adapter/ext/fawe/v1_19_R3/PaperweightAdapter.java

@@ -173,6 +173,8 @@ public final class PaperweightAdapter implements BukkitImplAdapter<net.minecraft
     private final Field chunkProviderExecutorField;
     private final Watchdog watchdog;
 
+    private final Boolean folia;
+
     // ------------------------------------------------------------------------
     // Code that may break between versions of Minecraft
     // ------------------------------------------------------------------------
@@ -186,6 +188,16 @@ public final class PaperweightAdapter implements BukkitImplAdapter<net.minecraft
             throw new UnsupportedClassVersionError("Not 1.19.4!");
         }
 
+        boolean isFolia = false;
+        try {
+            // Assume API is present
+            Class.forName("io.papermc.paper.threadedregions.scheduler.EntityScheduler");
+            isFolia = true;
+        } catch (Exception unused) {
+
+        }
+        this.folia = isFolia;
+
         serverWorldsField = CraftServer.class.getDeclaredField("worlds");
         serverWorldsField.setAccessible(true);
 
@@ -222,6 +234,10 @@ public final class PaperweightAdapter implements BukkitImplAdapter<net.minecraft
         }
     }
 
+    public Boolean isFolia() {
+        return folia;
+    }
+
     @Override
     public DataFixer getDataFixer() {
         return PaperweightDataConverters.INSTANCE;