def METHOD_NAME(model_run_with_data_rows):
    model_run = model_run_with_data_rows
    before = list(model_run.model_run_data_rows())
    annotation_data_row = before[0]
    data_row_id = annotation_data_row.data_row().uid
    model_run.delete_model_run_data_rows(data_row_ids=[data_row_id])
    after = list(model_run.model_run_data_rows())
    assert len(before) == len(after) + 1