class_docstr: Test the basic serializer and deserializer (i.e. using pickle),
  including metadata access.
code: def test_serializer_save(self, tmp_path):
      Serializer.save(
          self.image1,
          tmp_path / "test_serializer_save.pkl",
          info={"info": "example"},
          key={1: 2},
      )
  
imports: import numpy
  from holoviews import Image, Layout
  from holoviews.core.io import Deserializer, Pickler, Serializer, Unpickler
  from holoviews.element.comparison import assert_element_equal
label_desc: Use image node_id 2 for calling the TestSerialization obj's underlying member method code with example usage: obj.test_serializer_save(tmp_path) without return types