code: def test_copy(c=BitSet):
      b = c([1, 5, 100, 60])
      assert b == b.copy()
  
file_path: whoosh/tests/test_bits.py
imports: from whoosh.filedb.filestore import RamStorage
  from whoosh.idsets import BitSet, OnDiskBitSet, SortedIntSet
label_desc: Use image node_id 6 for calling a global function with example usage: test_copy(c) without return types