code: def __init__(self, is_available: bool = False):
      self.is_available = is_available
  
imports: import unittest
  from pathlib import Path
  from typing import Any, Dict, List
  from transfer_nlp.plugins.config import CallableInstantiationError, ExperimentConfig, LoopInConfigError, UnknownPluginException, UnknownReferenceError, register_plugin
label_desc: Use image node_id 1 to create a new DemoIsAvailable object  with example: obj = DemoIsAvailable(is_available)