code: def field(pytree_node=True, **kwargs):
      return dataclasses.field(
          metadata={"pytree_node": pytree_node}, **kwargs
      )
  
file_path: flax/flax/struct.py
imports: import dataclasses
  from typing import TypeVar
  import jax
  from typing_extensions import dataclass_transform
  from .None import serialization
label_desc: Use image node_id 1 for calling a global function with example usage: field(pytree_node) and returns: dataclasses