@EventHandler()
public void onPlayerToggleSneakEvent(PlayerToggleSneakEvent e) {
    Bukkit.broadcastMessage("PlayerToggleSneakEvent");
    if (e.isSneaking()) {
        Entity entity = e.getPlayer().launchProjectile(Arrow.class);
        Bukkit.broadcastMessage("Projectile instance of Arrow ? "+(entity instanceof Arrow));
    } else Bukkit.broadcastMessage("Not Sneaking");
}