code: def test_apply_alias(self):
      def foo(d):
          d["x"] *= 2
          return d
  
      d = {"a": 1, "b": 3}
      result = apply_alias(foo, {"b": "x"})(d)
      self.assertDictEqual({"a": 1, "b": 6}, result)
  
file_path: MONAI/tests/test_adaptors.py
imports: from __future__ import annotations
  import itertools
  import unittest
  from monai.transforms.adaptors import FunctionSignature, adaptor, apply_alias, to_kwargs
label_desc: Use image node_id 1 for calling the TestApplyAlias obj's underlying member method code with example usage: obj.test_apply_alias() and returns: d