code: def run_gc(self):
      # Several Go GC runs can be required to run all finalizers
      for i in range(5):
          cgotest.runGC()
      gc.collect()
  
imports: import contextlib
  import gc
  import os
  import unittest
  import pyarrow
  from pyarrow.cffi import ffi
label_desc: Use image node_id 4 for calling the BaseTestGoPython obj's underlying member method code with example usage: obj.run_gc() without return types