Crumbling inheritance

- Instead of returning a list, collect crumbling instances via consumer.
- This is much friendlier to inheritance and generally better represents
  the behavior we want from Visuals.

src/main/java/com/jozufozu/flywheel/api/visual/BlockEntityVisual.java

@@ -1,11 +1,17 @@
 package com.jozufozu.flywheel.api.visual;
 
-import java.util.List;
+import java.util.function.Consumer;
 
 import com.jozufozu.flywheel.api.instance.Instance;
 
 import net.minecraft.world.level.block.entity.BlockEntity;
 
 public interface BlockEntityVisual<T extends BlockEntity> extends Visual {
-	List<Instance> getCrumblingInstances();
+	/**
+	 * Collect all instances that should render with a crumbling overlay
+	 * when the block corresponding to this visual is being broken.
+	 *
+	 * @param consumer A consumer to provide instances to.
+	 */
+	void collectCrumblingInstances(Consumer<Instance> consumer);
 }

src/main/java/com/jozufozu/flywheel/impl/visualization/VisualizationManagerImpl.java

@@ -10,6 +10,7 @@ import com.jozufozu.flywheel.api.backend.BackendManager;
 import com.jozufozu.flywheel.api.backend.Engine;
 import com.jozufozu.flywheel.api.event.RenderContext;
 import com.jozufozu.flywheel.api.event.RenderStage;
+import com.jozufozu.flywheel.api.instance.Instance;
 import com.jozufozu.flywheel.api.task.Plan;
 import com.jozufozu.flywheel.api.task.TaskExecutor;
 import com.jozufozu.flywheel.api.visual.DynamicVisual;
@@ -227,7 +228,9 @@ public class VisualizationManagerImpl implements VisualizationManager {
 				continue;
 			}
 
-			var instances = visual.getCrumblingInstances();
+			List<Instance> instances = new ArrayList<>();
+
+			visual.collectCrumblingInstances(instances::add);
 
 			if (instances.isEmpty()) {
 				// The visual doesn't want to render anything crumbling.

src/main/java/com/jozufozu/flywheel/vanilla/BellVisual.java

@@ -1,6 +1,6 @@
 package com.jozufozu.flywheel.vanilla;
 
-import java.util.List;
+import java.util.function.Consumer;
 
 import org.joml.AxisAngle4f;
 import org.joml.Quaternionf;
@@ -89,8 +89,8 @@ public class BellVisual extends AbstractBlockEntityVisual<BellBlockEntity> imple
 	}
 
 	@Override
-	public List<Instance> getCrumblingInstances() {
-		return List.of(bell);
+	public void collectCrumblingInstances(Consumer<Instance> consumer) {
+		consumer.accept(bell);
 	}
 
 	@Override

src/main/java/com/jozufozu/flywheel/vanilla/ChestVisual.java

@@ -2,8 +2,8 @@ package com.jozufozu.flywheel.vanilla;
 
 import java.util.Calendar;
 import java.util.EnumMap;
-import java.util.List;
 import java.util.Map;
+import java.util.function.Consumer;
 
 import org.joml.Quaternionf;
 
@@ -161,8 +161,10 @@ public class ChestVisual<T extends BlockEntity & LidBlockEntity> extends Abstrac
 	}
 
 	@Override
-	public List<Instance> getCrumblingInstances() {
-		return List.of(bottom, lid, lock);
+	public void collectCrumblingInstances(Consumer<Instance> consumer) {
+		consumer.accept(bottom);
+		consumer.accept(lid);
+		consumer.accept(lock);
 	}
 
 	@Override

src/main/java/com/jozufozu/flywheel/vanilla/ShulkerBoxVisual.java

@@ -1,6 +1,6 @@
 package com.jozufozu.flywheel.vanilla;
 
-import java.util.List;
+import java.util.function.Consumer;
 
 import org.joml.Quaternionf;
 
@@ -126,8 +126,9 @@ public class ShulkerBoxVisual extends AbstractBlockEntityVisual<ShulkerBoxBlockE
 	}
 
 	@Override
-	public List<Instance> getCrumblingInstances() {
-		return List.of(base, lid);
+	public void collectCrumblingInstances(Consumer<Instance> consumer) {
+		consumer.accept(base);
+		consumer.accept(lid);
 	}
 
 	@Override