text: from ..mapper import PropertyMapper, ApiInterfaceBase
  from ..mapper.types import Timestamp, AnyType
  
  __all__ = ['Placeholder', 'PlaceholderInterface']
  
  
  class PlaceholderInterface(ApiInterfaceBase):
      is_linked: bool
      title: str
      message: str
  
  
  class Placeholder(PropertyMapper, PlaceholderInterface):
      pass
  