code: def setup_method(self):
      self.image1 = Image(
          np.array([[1, 2], [4, 5]]), group="Group1", label="Im1"
      )
      self.image2 = Image(
          np.array([[5, 4], [3, 2]]), group="Group2", label="Im2"
      )
  
file_path: holoviews/holoviews/tests/core/test_archives.py
imports: import json
  import os
  import tarfile
  import zipfile
  import numpy
  from holoviews import Image
  from holoviews.core.io import FileArchive, Serializer
label_desc: Use image node_id 1 for calling the TestFileArchive obj's underlying member method code with example usage: obj.setup_method() without return types