code: def support_level_str(level: OpSchema.SupportType) -> str:
      return (
          "<sub>experimental</sub> "
          if level == OpSchema.SupportType.EXPERIMENTAL
          else ""
      )
  
imports: import os
  from collections import defaultdict
  from typing import Any, Dict, List, NamedTuple, Sequence, Set, Tuple
  import numpy
  from onnx import defs, helper
  from onnx.backend.sample.ops import collect_sample_implementations
  from onnx.backend.test.case import collect_snippets
  from onnx.defs import ONNX_ML_DOMAIN, OpSchema
label_desc: Use image node_id 12 for calling a global function with example usage: support_level_str(level) and returns: unknown