Labeling loop in a necessary case

PlayerInvseeMenu.java

// Make it ordered
for (int index = 0; index < contents.length; index++) {
  ItemStack current = contents[index];
  if (current == null) {
    // Search for the most closed
    searchFirst: for (int newSlot = index + 1; newSlot < contents.length; newSlot++) {
      current = contents[newSlot];
      if (current != null && current.getType() != Material.AIR) {
        contents[newSlot] = null;
         break searchFirst;
      }
      
    if (current != null) {
      contents[index] = current;
    }
}