code: def fn(x: int) -> int:
      return x + 1
  
file_path: BentoML/tests/integration/frameworks/models/picklable_model.py
imports: from __future__ import annotations
  import numpy
  import bentoml
  from .None import FrameworkTestModel
  from .None import FrameworkTestModelConfiguration
  from .None import FrameworkTestModelInput
label_desc: Use image node_id 1 for calling a global function with example usage: fn(x) and returns: unknown