code: def testCompileAlreadyCompiledInputs(self):
      producer = DummyNode("MyProducer")
      consumer = DummyNode(
          "MyConsumer", inputs={"x": producer.output("x")}
      )
  
      p = self._prepare_pipeline([producer, consumer])
      ctx = compiler_context.PipelineContext(p)
  
      fake_channel_pb = text_format.Parse(
          """
        context_queries {
          type {
            name: "Foo"
          }
          name {
            field_value {
              string_value: "foo"
            }
          }
        }
        artifact_query {
          type {
            name: "Dummy"
          }
        }
        output_key: "x"
      """,
          pipeline_pb2.InputSpec.Channel(),
      )
  
      ctx.channels[producer.output("x")] = fake_channel_pb
      result = pipeline_pb2.NodeInputs()
      node_inputs_compiler.compile_node_inputs(ctx, consumer, result)
  
      self.assertProtoEquals(
          result.inputs["x"].channels[0], fake_channel_pb
      )
  
imports: from typing import List, Type
  from absl.testing import parameterized
  import tensorflow
  from tfx import types
  from tfx.dsl.compiler import compiler_context
  from tfx.dsl.compiler import node_inputs_compiler
  from tfx.dsl.components.base import base_component
  from tfx.dsl.components.base import base_node
  from tfx.dsl.components.base import executor_spec
  from tfx.dsl.control_flow import for_each
  from tfx.dsl.experimental.conditionals import conditional
  from tfx.dsl.experimental.node_execution_options import utils
  from tfx.dsl.input_resolution import resolver_function
  from tfx.dsl.input_resolution import resolver_op
  from tfx.dsl.placeholder import placeholder
  from tfx.orchestration import pipeline
  from tfx.proto.orchestration import pipeline_pb2
  from tfx.types import channel
  from tfx.types import channel_utils
  from tfx.types import component_spec
  from tfx.types import standard_artifacts
  from google.protobuf import text_format
label_desc: Use image node_id 4 for calling the NodeInputsCompilerTest obj's underlying member method code with example usage: obj.testCompileAlreadyCompiledInputs() without return types