code: def create_test_pipeline():
      """Builds a pipeline with Placeholder in pipeline_root."""
      pipeline_name = "pipeline_root_placeholder"
      tfx_root = "tfx_root"
      data_path = os.path.join(tfx_root, "data_path")
      pipeline_root = ph.runtime_info("platform_config").base_dir
  
      example_gen = CsvExampleGen(input_base=data_path)
      return pipeline.Pipeline(
          pipeline_name=pipeline_name,
          pipeline_root=pipeline_root,
          components=[example_gen],
          enable_cache=True,
          execution_mode=pipeline.ExecutionMode.SYNC,
      )
  
imports: import os
  from tfx.components import CsvExampleGen
  from tfx.dsl.placeholder import placeholder
  from tfx.orchestration import pipeline
label_desc: Use image node_id 1 for calling a global function with example usage: create_test_pipeline() and returns: pipeline