try {
            for (World world : getServer().getWorlds()) {
                for (Chunk c : world.getLoadedChunks()) {
                    CraftChunk cc = (CraftChunk) c;
                    Field f = net.minecraft.server.v1_9_R1.Chunk.class.getDeclaredField("entityCount");
                    f.setAccessible(true);
                    gnu.trove.map.hash.TObjectIntHashMap<Class<?>> counts = (TObjectIntHashMap<Class<?>>) f.get(cc.getHandle());

                    TObjectIntIterator<Class<?>> it = counts.iterator();
                    while (it.hasNext()) {
                        it.advance();
                        Class<?> key = it.key();
                        int value = it.value();
                        if (value != 0) {
                            System.out.println(key + ": " + value);
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }