code: def __call__(self):
      with open("file.txt") as f:
          return f.read().strip()
  
imports: import argparse
  from ray import serve
  from ray._private.test_utils import wait_for_condition, get_ray_default_worker_file_path
  from ray.serve.handle import DeploymentHandle
label_desc: Use image node_id 1 for calling the Model obj's underlying member method code with example usage: obj.__call__() and returns: f