code: def gc_collect():
      """Run the garbage collector twice (needed when running
      reference counting tests with PyPy)"""
      gc.collect()
      gc.collect()
  
imports: import pytest
  import textwrap
  import difflib
  import re
  import sys
  import contextlib
  import platform
  import gc
label_desc: Use image node_id 12 for calling a global function with example usage: gc_collect() without return types