code: def test_repeating_fields_repeated(self, raw_field):
      header_field = metadata._RAW_TO_EMAIL_MAPPING[raw_field]
      data = "VaLuE"
      single_header = f"{header_field}: {data}"
      repeated_header = "\n".join([single_header] * 2)
      raw, unparsed = metadata.parse_email(repeated_header)
      assert not unparsed
      assert len(raw) == 1
      assert raw_field in raw
      assert raw[raw_field] == [data] * 2
  
imports: import pathlib
  import pytest
  from packaging import metadata, requirements, specifiers, utils, version
  from packaging.metadata import ExceptionGroup
label_desc: Use image node_id 4 for calling the TestRawMetadata obj's underlying member method code with example usage: obj.test_repeating_fields_repeated(raw_field) without return types