code: def testForEach_As_GivesLoopVariable(self):
      reg = dsl_context_registry.get()
  
      a = A().with_id("Apple")
      with for_each.ForEach(a.outputs["aa"]) as aa:
          reg.peek_context()
  
      self.assertIsInstance(aa, resolved_channel.ResolvedChannel)
      self.assertEqual(aa.type, AA)
  
imports: import unittest
  import tensorflow
  from tfx import types
  from tfx.dsl.components.base import base_node
  from tfx.dsl.context_managers import dsl_context_registry
  from tfx.dsl.control_flow import for_each
  from tfx.orchestration import pipeline
  from tfx.types import resolved_channel
  from tfx.utils import test_case_utils
label_desc: Use image node_id 2 for calling the ForEachTest obj's underlying member method code with example usage: obj.testForEach_As_GivesLoopVariable() without return types