text: from pathlib import Path
  from utils import save_processed_data, get_saved_file_path, get_upstream_tasks_output_concat_df
  from constants import X, Y, XY, TASK
  
  
  # TODO This is just an example code for a simple transformation task
  def create_xy_column(**context) -> Path:
      df = get_upstream_tasks_output_concat_df(context, remove_none_values=True)
      xy_series = df[X].astype(str) + "/" + df[Y].astype(str)
      xy_series.name = XY
  
      saved_file_path = get_saved_file_path(context[TASK].task_id)
      save_processed_data(xy_series, saved_file_path, use_index=False)
      return saved_file_path
  