GUI:
  ChristmasMail:
    MailSendingDetailGUI:
      Item:
        Button:
          Message:
            Material: "PAPER"
          Gift:
            Material: "PLAYER_HEAD"
  Settings:
    Option:
      OptionGUI:
        Item:
          Button:
            Season:
              Material: "CLOCK"
            Figure:
              Material: "ARMOR_STAND"
            MailBox:
              Material: "ENDER_CHEST"
            Restriction:
              Material: "BARRIER"
      OptionSection:
        OptionSeasonGUI:
          Item:
            Button:
              Start:
                Material: "SLIME_BALL"
              Gap:
                Material: "BLAZE_POWDER"
              End:
                Material: "MAGMA_CREAM"
        OptionMailBoxGUI:
          Item:
            Button:
              Capacity:
                Material: "GOLD_INGOT"
              Extension:
                Material: "GOLD_BLOCK"
        OptionRestrictionGUI:
          Item:
            Button:
              World:
                Material: "GRASS_BLOCK"
    Component:
      ListGUI:
        Item:
          Button:
            CapacityExtension:
              Material: "GOLD_BLOCK"