text: from typing import Optional
  from pydantic import BaseModel
  
  class Item(BaseModel):
      job_id: str = "1"
  
  class ItemReg(Item):
      message: str = "message"
      color: Optional[str] = "primary"  # white, red, green, ..., colorful
      fontsize: Optional[int] = 16  # 8 - 32
  
  class ItemShow(Item):
      bright: Optional[float] = 0.5   # 0.0 - 1.0
      interval: Optional[float] = 0.0
  
  class ItemDo(ItemShow, ItemReg):
      reserved: Optional[int] = 0
  
  