def METHOD_NAME():
    operations = {"variables": {"fileA": None, "fileB": None}}
    files_map = {"0": ["variables.fileA"], "1": ["variables.fileB"]}
    files = {"0": "A", "1": "B"}
    assert combine_multipart_data(operations, files_map, files) == {
        "variables": {"fileA": "A", "fileB": "B"}
    }