code: def _check_weight_threshold(instance, attribute, value):
      if value is not None and value < 0:
          raise ValueError(
              f'"weight_threshold" must be a non-negative integer. Got {value}.'
          )
  
imports: import sys
  from abc import ABC, abstractmethod
  from collections import OrderedDict
  from typing import IO, Any, Callable, Dict, Optional, Tuple, Union
  import cattrs
  import numpy
  import yaml
  from attrs import define, field, validators
  from coremltools.converters.mil.mil import Operation, types
  from coremltools.converters.mil.mil.types.type_mapping import is_builtin, numpy_type_to_builtin_type
label_desc: Use image node_id 1 for calling a global function with example usage: _check_weight_threshold(instance, attribute, value) without return types