code: def test_weakref():
      sbuilder = StringBuilder()
      wr = weakref.ref(sbuilder)
      assert wr() is not None
      del sbuilder
      assert wr() is None
  
file_path: arrow/python/pyarrow/tests/test_builder.py
imports: import weakref
  import numpy
  import pyarrow
  from pyarrow.lib import StringBuilder
label_desc: Use image node_id 1 for calling a global function with example usage: test_weakref() without return types