Haven't seen this command in a few of the new realeases so i'm just going to post it, no h8 

Commands.java
Code:
if (cmd[0].equalsIgnoreCase("switchitemslook")) {
player.switchItemsLook();
player.getPackets().sendGameMessage("You are now playing with " + (player.isOldItemsLook() ? "old" : "new") + " item looks.");
return true;
}
Player.java
Code:
private boolean oldItemsLook;
public boolean isOldItemsLook() {
return oldItemsLook;
}
public void switchItemsLook() {
oldItemsLook = !oldItemsLook;
getPackets().sendItemsLook();
}
WorldPacketsEncoder.java
Code:
public void sendItemsLook() {
OutputStream stream = new OutputStream(2);
stream.writePacket(player, 159);
stream.writeByte(player.isOldItemsLook() ? 1 : 0);
session.write(stream);
}