text: from marshmallow.fields import DateTime
  from marshmallow.fields import Nested
  
  from iep.application.schemas import DataModelSchema
  from iep.application.schemas import UUID
  from iep.panels.schemas import PanelSchema
  
  
  class PanelTimeSchema(DataModelSchema):
  
      convention_uid = UUID()
      panel_uid = UUID()
      room_uid = UUID()
  
      begin_date = DateTime()
      end_date = DateTime()
  
      panel = Nested(PanelSchema)
  