code: def test_merge_IndexAdditiveQuantizerFastScan(self):
      self.do_fast_scan_test("RQ10x4fs_32_Nrq2x4", 330)
  
imports: import unittest
  import faiss
  import numpy
  from faiss.contrib.datasets import SyntheticDataset
  from common_faiss_tests import Randu10k
label_desc: Use image node_id 11 for calling the TestMerge2 obj's underlying member method code with example usage: obj.test_merge_IndexAdditiveQuantizerFastScan() without return types