Use ? super in Consumer/Predicate API (#9939)

patches/api/isChunkGenerated-API.patch

@@ -17,9 +17,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  import java.util.Map;
  import org.bukkit.block.Block;
 @@ -0,0 +0,0 @@ public class Location implements Cloneable, ConfigurationSerializable, io.paperm
+ 
      public boolean isChunkLoaded() { return this.getWorld().isChunkLoaded(locToBlock(x) >> 4, locToBlock(z) >> 4); } // Paper
  
-     // Paper start
++    // Paper start - isGenerated API
 +    /**
 +     * Checks if a {@link Chunk} has been generated at this location.
 +     *
@@ -30,9 +31,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        Preconditions.checkNotNull(world, "Location has no world!");
 +        return world.isChunkGenerated(locToBlock(x) >> 4, locToBlock(z) >> 4);
 +    }
++    // Paper end - isGenerated API
++
+     // Paper start - expand location manipulation API
  
      /**
-      * Sets the position of this Location and returns itself
 diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/World.java