code: def test_MergeCSVFiles_inputs():
      input_map = dict(
          column_headings=dict(),
          extra_column_heading=dict(),
          extra_field=dict(),
          in_files=dict(
              mandatory=True,
          ),
          out_file=dict(
              extensions=None,
              usedefault=True,
          ),
          row_heading_title=dict(
              usedefault=True,
          ),
          row_headings=dict(),
      )
      inputs = MergeCSVFiles.input_spec()
  
      for key, metadata in list(input_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(inputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_MergeCSVFiles_inputs() without return types